Katie Holmes looks fantastic, but she's not exactly sticking to the 2013 Costume Institute Gala's punk theme with this Grecian goddess-inspired white Calvin Klein dress! Then again, unless you're Miley Cyrus or Kristen Stewart, it is pretty difficult to pull off this look naturally...

Sienna Miller (who was accompanied by baby daddy Tom Sturridge) also wore a long white gown, but from the clutch to the studded leather jacket and studded headband, she was way more into the night's theme:

J. Lo just loooooves any excuse to wear an animal print number that showcases her amazing physique!

On Monday evening the 43-year-old actress and pal Michael Kors were snapped en route to the 2013 Costume Institute Gala in New York City, and her MK gown isn't that punk rock, but the hair is definitely edgier than what she usually wears! And c'mon ... how can you give J. Lo flack when she looks this good after two kids, three divorces and over four decades on Earth?

From the eye makeup to the vintage sequined Chanel dress to the blood red accents on her shoes and nails, January Jones definitely nailed the punk theme when we snapped her heading to the 2013 Costume Institute Gala in New York City on Monday night.

Now, here's what we really wanna know: What will happen if January runs into Miley Cyrus tonight? Will Miles take the opportunity to chew the Mad Men actress out for fooling around with her fiance Liam Hemsworth, or will the two take the high road and pretend like it never happened?

Karl Lagerfeld called and he wants his hair back!

When we saw that Nicole Richie uploaded a photo from the salon yesterday, we were hoping she was going for a hot bleached blonde 'do, but instead she's trying a little too hard to be a rebel with her white locks.

As you know, the theme of the 2013 Costume Institute Gala is "Punk: From Chaos to Couture," and while we love Nicole's white Topshop dress and studded ear cuff, she covered up her tattoos and ended up looking more like a hot 70-something than the fashionista we know and love. Wonder if she should have consulted with rock star hubby Joel Madden before her big night out?

Just because you're skinny doesn't mean this stuff isn't bad for you, Brit Brit!

Britney Spears stopped by her local grocery store in Thousand Oaks this morning to pick out some goodies, and clearly the pop princess didn't think she needed to change out of her sweats and slippers for the errand run!

The "Toxic" singer has a serious addiction to junk food! When she walked out of the store, she was sipping a Sprite soda, and her bodyguard was pushing a cart filled with potato chips and other unhealthy items. Somebody get this girl a food pyramid!

If the blonde bombshell paid more attention to her nutrition, maybe the condition of her skin and hair would be a little better!

It was a long weekend for our favorite Southern belle, who was forced to evacuate her Calabasas home and hunker down at the posh Four Seasons in Westlake Village until firefighters controlled the wildfires in her neighborhood.

She's headed for the big house!

Lauryn Hill was just sentenced to three months in prison after failing to pay taxes on $1 million in earnings.

In addition to her sentence, the Grammy winner was also given three months of home confinement. Hill maintains she always intended to pay the backed money, but did not have the means after retiring from the music business to raise her six children.

"I needed to be able to earn so I could pay my taxes, without compromising the health and welfare of my children, and I was being denied that," she told the judge Monday.

The R&B diva originally faced a maximum of one year on each of the three counts, so considering that we think she got off easy!

Nothing like a stroll around the city with your pal and your pooch!

Jessica Biel took her pet pit bull Tina on a walk for some exercise in N.Y.C. today, and the actress invited a girlfriend and her dog along for the excursion as well!

Just last night, the Total Recall star came out to support her husband Justin Timberlake, who performed a 15-song set at the Roseland Ballroom. We wonder if the brunette beauty will join her man on tour? JT is expected to kick off the tour July 17 in Toronto.

For those of you that love his latest album, there's more where that came from! The sexy singer revealed the second half of the 20/20 Experience is set to hit stores on Sept. 30.

Miss Biel is definitely his muse!

Run, Kourtney. Run!

Kourtney Kardashian made a frantic dash to her car after leaving a friend's house in Calabasas yesterday. The fashion-forward designer donned workout gear, complete with sunglasses and neon orange-accented running shoes. We wonder if she's sporting MILF Arthur George socks as well.

It's hard to believe that she gave birth to Penelope less than a year ago. The Keeping Up with the Kardashians star looks slimmer than ever.

Aside from exercising regularly, the mom of two has also been keeping busy with work. In fact, she and her sisters unveiled their latest Kardashian Kollection line Saturday in Houston. The eighth season of Keeping Up premieres on June 2.