Pete Wentz' bachelor party may have been a relatively quiet affair - but Ashlee's bachelorette function got a little bit wilder!

Ashlee met up with her pal Nicole Richie and a gaggle of girlfriends at Kiki de Montparnasse. The girls must have had a whale of a time perusing the boutique's selection of high-end marital aids - after all, how often do you come face with a twelve-hundred-dollar, uh, "c-ring" (link NSFW)?

Around midnight, however, the group decided to head over to the Roosevelt to party with Pete and the guys. Pete ended up sneaking out around 1:30 in the morning, but apparently Ashlee's older sister Jessica wanted to party extra hearty, too - not only did Jess stay at the club a full hour and a half longer than Pete, but she and her gal pals ended up cramming into her car for a late-night food run to Wendy's!

X17 was the first to break the location of the big rock 'n roll wedding yesterday - and now we're bringing you the exclusive pix!

Crews have been setting up for the big day 'round the clock at the home of Joe and Tina Simpson, where they've erected enormous tents at the Encino home, built an altar, and moved in tons of sound and stage equipment. Will Fall Out Boy be serenading the glowing bride? Or will maid of honor Jessica sing something for the happy couple?

But the real question is - will Ashlee be making an expected announcement at the wedding?

Yup, it's true - not only is the couple getting married this Saturday, X17 can Xclusively reveal that the nuptials will be taking place at Ashlee's parents house in Encino!

Y'all still think there's even a possibility she's not really preggers? Well, who knows!

People Mag may be getting the official wedding pix from the couple, but you can bet we'll be ready with our lenses come Saturday - in fact, they're already setting up tents now!

Stay tuned for more info and pix coming soon!

UPDATE! According to X17 photogs on the scene, delivery trucks are coming in and out of Joe and Tina Simpson's gated community as we speak write!

Tents are also being erected out back - so it looks to be a good, old-fashioned backyard wedding and NOT a San Diego ceremony as other sites have reported.

The emo twins, back in town after their Parisian getaway, were spotted out and about in Hollywood last night...

Hmm, why's Ashlee got her bag in front of her stomach in every pic? Is she trying to cover something up?

The wedding may be happening this Saturday... but when is Ash gonna confirm - or deny! - those pregnancy rumors?

At least that's what Pete told our photographers last night on the way to dinner!

He was kidding, of course, unless Morton's supplies a Justice of the Peace with every steak!

But if reports are to be believed, and the wedding is taking place this Saturday, that would be from engaged to wed in about a month...can someone say "shotgun"?

We're not sure if the engaged couple did something special for Ashlee on mother's day or not - but we did catch them out walking Pete's dog Hemingway Sunday!

Hey, it's healthier than a pitcher of margaritas!

Course, maybe the two are more concerned with their impending nuptials than getting a nursery together - Us is reporting that they may happen as soon as this Saturday!

Say what you will about Ashlee Simpson, but she sure is good at keeping her name in the papers - first she coyly refuses to confirm or deny her pregnancy, and now she's running around calling Britney Spears "trashy"!

As noted by the Sun, during a taping of the Nokia Green Room earlier this week, Ashlee revealed that a radio interviewer had recently asked her whether she'd had too many "Britney Spears" - or Cockney rhyming slang for 'beers'.

Unfortunately, Ashlee misunderstood the question - and responded that she hadn't had too many "trashy girls"!

As you might expect, the singer looked horrified once she realized what she'd just said - or rather, what she'd just repeated! Jeez, Ashlee - if you're really that embarrassed about your gaffe, maybe national television isn't the best place to talk about it!

Luckily Pete was on hand to stroke his fiancee's hand and help reassure Ash while the weight of her words sank in. And hey, if it gave her a chance to show off her engagement ring, so much the better!

Jessica Simpson may be keeping mum on her own wedding rumors, but one thing she's not shy about is bragging that she'll be standing up next to her sister on Ashlee's big day!

People mag reports that when asked if she'll be her engaged younger sister's maid of honor, the singer/actress replied "of course!"

Think Ashlee will do the same for Jess if she and Tony Romo get hitched? Or will she be too big to waddle down the aisle by then?

What, you thought you'd seen all the shopping Pete Wentz and Ashlee Simpson did during their Parisian vacation? Well, guess again - as you can tell from this video, those crazy kids sure hate their credit cards!

In fact, the only thing Pete and Ashlee can't seem to buy is relief from the press - sorry, guys, but if you'd just clear up one little matter, we'd be able to move on!

Damn, Pete - those are some pretty hot shades! Think Ashlee picked 'em out?

The engaged emo couple made the most of their trip to Paris - here are s'more pics of them shopping at Chanel on Cinco de Mayo.

And did Ash steal Hilary Duff's superbad chains? This trend must stop!

Pete Wentz and Ashlee Simpson didn't just "do Paris" - they did Paris right!

Check out how happy Pete and Ash look as they spend the day hopping from one shop to another - Dior, Lanvin, even the Disney store! They sure looked at a lot of toys - could Pete and Ashlee be shopping for a little one, or are they just young at heart?

Although that's quite a shirt for possible Dad-to-be. Pete zipped it up as soon as he saw the cameras, but we still managed to get a peek!

It's been over two weeks since we've seen Pete Wentz and Ashlee Simpson sharing each other's company - but as they proved yesterday in Paris, these two know how to make their time together count!

The couple took the Eurostar over from London to do a little shopping for the wedding they've got slated for later this month. They were shopping in style, too - we caught them stopping by Lanvin and Dior! (Of course, not all their shopping was such serious business - while on the Champs-Elysees, they made a little time for the Disney Store, too!)

After doing some serious damage to their credit limits, the couple retired until the evening, when they stepped out to dine at La Cantine du Faubourg before visiting the Eiffel Tower so that Pete could take in the sight. Aww - even though Pete's band's been everywhere on the planet except Antarctica, he's still a wide-eyed tourist at heart!

Of course, our eyes kept coming back to Ashlee as we frantically looked for any sign of her much-buzzed-about pregnancy. We're still not seeing a baby bump - but those boobs are starting to look awfully matronly!

Photo Courtesy Michael Rozman/Warner Bros.

Ashlee Simpson sure knows how to keep people guessing - but maybe not Ellen!

The is-she/is-she-not pregnant singer appears on The Ellen DeGeneres Show today and chats with Ellen about her engagement to Pete Wentz and those pesky pregnancy rumors, to which she says:

"This has been going on for quite a while. That is definitely something that I choose personally not to discuss except for the fact that maybe… do I look like I had 10 cheeseburgers or something? Because I don’t think I do."

We don't think she does, either! But it's still early, and Ash promises Ellen to let us know the real deal soon enough.

And if she and Pete are havin' a baby, we're sure he or she will be happy in Ashlee's new Beverly Hills pad (pictured above)! Damn - nice place!

Back in LA, newly engaged and possibly preggers Ashlee Simpson went for dinner with her fiance Pete Wentz at new Hollywood hotspot Foxtail.

She wore a loose-fitting shift dress, yet went out partying at a club.

Now if only we knew whether or not Ashlee was drinking!

Of course there are only two possibilities -- Ashlee's either pregnant or she isn't.

But either way, girlfriend is playing the total media tease. The loose-fitting jacket, the coy comments to the press. Gee, you think she learned it from daddy?

We caught the pregnant/some-things-you-want-to-keep-personal/engaged "rockers" arriving home in LA yesterday ... for a wedding? For a hearty laugh on Pop Fiction?

Phones are ringing off the hook here at X17 headquarters with people gabbing about Pete and Ashlee's impending nuptials -- they're saying it's happenin' this weekend!!!

Now, this COULD be much ado about nothing like it was with Brangelina's rumored wedding vows in New Orleans a couple weeks ago ... and it COULD bit the magazines and photo agencies getting nervous and scrambling because we're all so afraid to miss it ... and it COULD be the Ashlee PR maching stoking the fires, teasing us all ... or it COULD be TRUE!

We're gonna keep you updated and the second we see signs of flower delivery, Vera Wang, or Jess flying in from Nashville, we'll let you know!

Ashlee's gonna milk these pregnancy rumors for all they're worth!

She told the Today show's Matt Lauer this morning (reported by Us Weekly) that "only time will tell" if she's really pregnant -- she's not givin' it up!

"I am giving birth to my record ... that's my baby," she advertisedded.

Ash is also keeping her wedding date a secret; when asked about her impending nuptials to Pete Wentz she said the two are "just enjoying the engagement."

Pete got props for picking out a nice rock. Simpson said, "I feel like a really lucky lady ... He did a great job."