Rather than lounging by the pool, Britney Spears is spending her weekend on the set of her upcoming music video "Work B*tch." How appropriate!

Late last night Brit posted the sexy pic above on Facebook and wrote, "Hot day on set... A little dirty, little flirty, danced my A** off. Stoked for tomorrow." The 31-year-old pop star is about to bust out of her yellow and black lingerie, but she's lookin' goooood!

The song reportedly samples RuPaul's hit "Supermodel (You Better Work)" ... can't wait to see this! And we're also quite excited about Brit's duet with Miley Cyrus, but we'll have to wait a little bit longer for that one.

Last week Good Morning America announced that Brit will be performing live on the show on September 17, and she'll give everyone the scoop on her Las Vegas residency gig. She's been a busy bee lately!

Miley Cyrus may have made "history" at the MTV Video Music Awards last month, but the 20-year-old starlet's raunchy performance with Robin Thicke may have also cost her the December cover of Vogue Magazine.

Anna Wintour has "been eager to champion [Miley] as a new fashion icon," according to the Daily Mail, but the Vogue EIC changed her mind after seeing Miley make obscene gestures with a foam hand in a pair of nude latex underwear at the VMAs. And let's not forget her grinding all over Mr. Thicke, who is married to Paula Patton. Classy!

"Anna found the whole thing distasteful," a source says. "She decided, based on Miley’s performance, to take the cover in a different direction."

Do you think Miley will ever be on the cover of Vogue? I mean, as HuffPo points out, they did put Kate Upton on the front of the glossy...

Brandi Glanville and LeAnn Rimes may NEVER call a truce on Twitter, but yesterday the blonde starlets made nice on the soccer field to watch Brandi and ex-hubby Eddie Cibrian's son Jake play soccer. "It's 105 degrees for our first soccer game deep in the valley! #uggg," Brandi tweeted.

Though the two were sitting practically next to each other, they didn't speak a word, and when the game was over, LeAnn lured her hubby over for a kiss:



Brandi probably wasn't nuts about their PDA though -- two hours later the skinny blonde added, "I'm done with ALL men! #lesbianpillplease." Yikes!

X17 photographers snapped Charlie Hunnam cruising around Hollywood on his Harley Davidson on Saturday, and the Sons of Anarchy star was in a great mood. And why shouldn't he be? After the news hit the web last week that the British actor was cast as the male lead in the big screen adaptation of Fifty Shades of Grey, he's totally blown up!

Later in the evening Charlie appeared at the season six premiere of SOA at the Dolby Theatre in Hollywood, and he chatted with The Hollywood Reporter about his upcoming role.

When asked how he gets along with co-star Dakota Johnson, Charlie said, “As soon as we got in the room and started reading with Dakota, I knew that I definitely wanted to do it, because there was a tangible chemistry between us. It felt kind of exciting and fun and weird and compelling, and so that was it.”

So what about the sex scenes? “My first job was on a Channel 4 miniseries called Queer as Folk," Charlie said. "It was incredibly explicit sexual scenes with a man. I mean I’m 16 and 17 years wiser now. So if I could do it when I was 18 with a guy, I can certainly do it at 33 with a lady.”

And how does his longtime girlfriend Morgana McNelis feel about it? “It’s very hard to be with an actor. She’s required to share parts of me that she wouldn’t really want to share. With the nature of this role, that’s going to be times 10 … She read them and loved them and was really excited about the potential of the opportunity for me. If anything, I think it will make us closer," he said.

Heidi Klum stepped out with her kids at Michaels in Los Angeles on Saturday, and if we didn't know any better we'd ask if the former supermodel was pregnant!

This would be her fifth kid (her first with current beau Martin Kristen), and just the other day she wore a peplum dress that pretty much concealed the lower part of her midsection, so we gotta ask. Heidi has been dating her bodyguard/beau for about a year now, and the two began their romance about nine months after her split from Seal in 2012.

Do you think Heidi is preggers? Or did she just pick the wrong top?

Sparrow Madden certainly had one heck of a guest list at his 4th birthday bash on Saturday afternoon!

From Jessica Alba to Gwen Stefani to Kourtney Kardashian, some of Hollywood's hottest moms brought their kiddos to celebrate with Nicole Richie and Joel Madden's son at a hotel in Beverly Hills.

Joel helped wrangle the guests, and speaking of kids, there's still no word on whether Gwen is really pregnant with her third child, but she's definitely keeping us guessing with her outfits:

Aww, how cute is this!

On Saturday Reese Witherspoon went shopping with son Tennessee and daughter Ava, and the Oscar winner was more than happy to let her teenage daughter carry her one-year-old son.

Not sure where Tennessee's big bro Deacon was, but last weekend we spotted him with Reese and hubby Jim Toth grabbing some goodies before a Labor Day BBQ. Maybe he was hanging with dad Ryan Phillippe this weekend?

This week Reese will make her way to the Toronto International Film Festival to debut her new movie Devil’s Knot, which is a drama about the West Memphis Three.

Newly engaged Ashley Tisdale shopped at Intermix in Beverly Hills on Friday, and the starlet carried our fav Celine bag and showed off her toned and tanned bod in a pair of white shorts. What a rough life she's got!

While she is voicing a character on the upcoming Phineas and Ferb movie (in case you didn't know, she's voiced Candace Flynn on the TV show since 2007!), there are no other big roles for her this year.

She's certainly not busy planning her wedding, because after the news broke that Christoper French had popped the question, Ash told People, "I want to make sure it's perfect! But it's going to be a while. I started a Pinterest board, but I'm not one to rush anything. For me, it's stressful just thinking about my birthday, so I can't imagine my wedding day!"