January Jones was among the stars who turned out for Tommy Hilfiger’s spring 2010 show last night. The shocking-pink hue of the actress’s dress (by Hilfiger) was a stark contrast from the cool color palette of her Mad Men character, Betty Draper.

In Love Happens, Aaron Eckhart plays a widower turned best-selling self-help author who subsequently becomes romantically involved with one of his seminars’ attendees, played by Jennifer Aniston (who recently spoke with ELLE about relationships). Aniston certainly didn’t need any sartorial help at the movie's Hollywood premiere: The actress wore a gorgeous silver beaded minidress by Valentino.

Spanish designer Davidelfin presented at Bryant Park for the first time last Thursday, garnering acclaim for his spring 2010 collection’s powerful blue-and-green palette. R&B songstress Amerie was so taken with the show that she requested this caped aqua minidress, which she wore to Sunday night’s MTV Video Music Awards.

In one of the MTV Video Music Awards’ most unpredictable moments last night, Kanye West interrupted Taylor Swift’s acceptance speech for her Best Female Video win to say that Beyonce’s “Single Ladies” is “one of the greatest videos of all time.” Swift handled the outburst with grace, looking perfectly elegant in a Kaufmanfranco gown adorned with sparkling silver sequins.

In Pedro Almodóvar’s Broken Embraces, Penélope Cruz plays a struggling actress who makes a living as a secretary and call girl. As her Best Supporting Actress Oscar (for Vicky Cristina Barcelona) proves, acting is hardly a struggle for Cruz. And neither is fashion: The Spanish-born star looked lovely in an aqua cocktail dress by RM by Roland Mouret at the movie’s Toronto Film Festival premiere.

Whitney Port was on top of the world last night at the premiere party for season two of The City. The Hills alum wore an eye-catching silver brocade minidress as she posed with fellow cast members on the red carpet. The coming episodes find Whitney returning to People’s Revolution, while Olivia Palermo takes a job at ELLE.

Rumer Willis stopped by The Late show with David Letterman Monday night to promote her new film, Sorority Row, a remake of the 1983 slasher flick The House on Sorority Row in which six sisters scheme to shame a cheating boyfriend by staging a death. Demi’s daughter, who’s also scheduled to guest-star in the upcoming season of 90210, looked perfectly polished in a pristine white Zac Posen sheath dress.

At the Daytime Emmy Awards Sunday, held at L.A.'s Orpheum Theatre, highlights included a tribute to Sesame Street (the recipient of a Lifetime Achievement Award), a dance number featuring host Vanessa Williams, and Tyra Banks’ win in the “best informative talk show” category. Banks also took top fashion honors for her elegant one-shoulder Rachel Roy dress, which she accessorized with Subversive for Rachel Roy cuffs.

In Mike Judge's Extract, Mila Kunis plays the comely new co-worker of Jason Bateman’s factory manager, who tempts him into an extramarital affair. At the movie’s L.A. premiere Monday night, Kunis looked stunningly seductive in a metallic brocade number by Matthew Williamson. What’s next for Kunis? Darren Aronofsky’s thriller Black Swan, in which she stars with Natalie Portman.

Ashlee Simpson-Wentz, who stars in the CW’s Melrose Place remake, stepped out to celebrate its premiere Saturday night in a sexy red-and-white zebra-print minidress by Elise Overland. The storied address’s new resident redhead was joined by its current starlets and actors from its original iteration, such as Laura Leighton, who’ll reprise her role as auburn vixen Sydney.