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In Hollywood, Katie Holmes and Tom Cruise made a red carpet appearance at the premiere of The Kennedys, where Holmes remembered getting into character to play legendary first lady Jacqueline Kennedy. “The wardrobe department worked very hard to re-create a lot of  Mrs. Kennedy’s iconic looks, including a hand-painted gown,” said Holmes, who looked every inch the style icon herself in a knitted lace dress from the Ralph Lauren Collection. “It was a lot of fun to do all of the fittings.” Across town, Jake Gyllenhaal arrived solo to a screening of Source Code but soon met up with onscreen flame Michelle Monaghan. In New York City, Michelle Williams sparked Chanel envy when she walked the press line at a screening of Meek’s Cutoff. See more photos from last night’s parties in the gallery.

1. Mariah Carey celebrated her birthday by painting a butterfly on her growing baby bump. [NYDN]

2. Princess Diana commissioned a spare wedding dress. It’s never been seen… until now! [People]

3. Kelly Osbourne is designing a jewelry line but details are under wraps for now. [Coco Perez]

4. Lily Allen is launching her own clothing collection inspired by a time-traveling fashionista. [WWD]

5. Nashville’s Fashion Week starts today! Betsey Johnson and Christian Siriano are slated to show. [Racked]

6. Kate Middleton celebrated her wedding with a low-key bachelorette party this week! [HuffoPo Style]

The celebrity contestants on Dancing With the Stars upped their game during last night’s show with jives and quicksteps galore! And besides learning new moves, they’re also incorporating style tricks into their performances, such as model Petra Nemcova’s slick costume change in the middle of her jive routine to “Crazy Little Thing Called Love.” The show’s costume designer Randall Christensen worked with Nemcova and her partner Dmitry Chaplin to create the look from scratch. “We did not want just a tear away skirt as it can sometimes be a bit predictable,” Christensen told InStyle. “We opted for the tear away to come from the empire area, so the midriff would be exposed afterwards.” However, the day of the show, he had to make a few emergency tweaks. “The dress was held together with snaps originally, but the snaps held too well, and we had to replace the snaps with Velcro after rehearsal,” Christensen said. “Petra was a bit concerned as to how strong the Velcro was and the amount of energy and strength needed to tear it away. But Petra is so dedicated and focused to what she is doing, and did not panic. What a dream lady to work with!” But will it take her to next week’s episode… we’ll see! Click through to see what the rest of the contestants wore on last night’s episode!

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