Family photo at Kim Kardashian and Kanye West’s wedding on May 24, 2014 in Versailles, Paris (Courtesy of Twitter)

Christina Ricci (Getty)

Christina Ricci (Courtesy of Twitter)

Christina Ricci & James Heerdegen (Fameflynet)

Christina Ricci & James Heerdegen (Fameflynet)

A model prepares backstage at the Carolina Herrera fashion show during Mercedes-Benz Fashion Week Spring 2014 at The Theatre at Lincoln Center on September 9, 2013 in New York City. (Michael Loccisano/Entertainment/Getty Images)

Christina Ricci poses backstage at the Richard Chai Spring 2014 fashion show during Mercedes-Benz Fashion Week at The Stage at Lincoln Center on September 5, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images for Mercedes-Benz Fashion Week)

Christina Ricci attends ‘The Fresh Air Fund: Salute To American Heroes’ in NYC May 30,2013 (SplashNews)

Christina Ricci at the BlackBerry Z10 Launch at Cecconi’s Restaurant in LA. (SplashNews)

NEW YORK, NY – MAY 07: Christina Ricci attends the “Schiaparelli And Prada: Impossible Conversations” Costume Institute Gala at the Metropolitan Museum of Art on May 7, 2012 in New York City. (Photo by Larry Busacca/Getty Images)

Christina Ricci & Robert Pattinson (Courtesy of Twitter)

Christina Ricci (Getty)

Christina Ricci (Getty)

Christina Ricci (Getty)

Rihanna, in a low-cut beaded Givenchy gown, at The 2012 BRIT Awards took place at The O2 in London, UK on February 21, 2012. (FameFlynet)

Reese Witherspoon, in a black Giambattista Valli frock, attends the “This Means War” South Korea premiere at Yeongdeungpo CGV on February 23, 2012 in Seoul, South Korea. (Photo by Chung Sung-Jun/Getty Images)

Eva Longoria, in a Cushnie et Ochs dress, attends the Vanity Fair and Chrysler celebration of The Eva Longoria Foundation hosted by Eva Longoria on Thursday, February 23 at Beso Hollywood. (Photo by John Shearer/Getty Images for VF)

Emma Stone, in Elie Saab, attends the 5th Annual ESSENCE Black Women in Hollywood Luncheon at the Beverly Hills Hotel on February 23, 2012 in Beverly Hills, California. (Photo by Frederick M. Brown/Getty Images)

From movie premieres to star-studded events, our favorite stylish stars know how to look fabulous for any occasion! Who do YOU think was best dressed this week? VOTE!

We were pleasantly surprised this week when we saw some of our favorite stars switch up their signature style! We adored that Jennifer Aniston opted for a flirty frock when she was awarded a star on the Hollywood Walk of Fame, and we also loved how sexy and sophisicated Rihanna was looking in gold at the Brit Awards! And what about Christina Ricci, who looked absolutely stunning in sequins? See who else shocked us with their fabulous style and VOTE for who YOU think is best dressed this week!

Jennifer Velez

Amanda Seyfried, in Nina Ricci, attended the ‘Gone’ premiere held at The Arclight Cinemas in Hollywood, California on February 21st, 2012. (FameFlynet)

Jennifer Aniston, in Chanel Resort, attended a ceremony unveiling a Star on Hollywood’s Walk of Fame in here honor on February 22, 2012 in Hollywood, California. (FameFlynet)

Rooney Mara, in J. Mendel, at the Costume Designers Guild Awards at the Beverly Hilton Hotel in Beverly Hills, CA. Getty Images

Pictured: Rooney Mara

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Kate Beckinsale, wearing Vivienne Westwood, at the Costume Designers Guild Awards at the Beverly Hilton Hotel in Beverly Hills, CA. Picture by: Splash News

Taylor Swift in a cream-colored Honor dress, attended the premiere of Dr. Seuss’ ‘The Lorax’ at the plaza of Universal Studios Hollywood in Universal City, California on February 19, 2012.

Christina Ricci, in a Jenny Packham gown, attended the ‘Bel Ami’ film premiere, 62nd Berlinale International Film Festival, Berlin, Germany – 17 Feb 2012 (Rex Features via AP Images)