Selena Gomez, in BCBG, attends Hollywood Stands Up To Cancer Event on Jan. 28, in LA. (Photo by Michael Buckner/Getty Images for Entertainment Industry Foundation)
Rihanna, in Chanel, on ‘GMA’ on Jan. 29, in NYC. (SplashNews)
Michelle Obama, in Alaia, at State Of The Union Address on Jan, 28. (Photo By Tom Williams/CQ Roll Call)
Taylor Swift, in Gucci, attends the 56th GRAMMY Awards at Staples Center on January 26, 2014 in Los Angeles, California. (Photo by Kevin Mazur/WireImage)
Getty, Courtesy of CBS
Katy Perry, in Valentino, attends the 56th GRAMMY Awards at Staples Center on January 26, 2014 in Los Angeles, California. (Photo by Kevin Mazur/WireImage)
Chrissy Teigen, in Johanna Johnson, attend the 56th GRAMMY Awards at Staples Center on January 26, 2014 in Los Angeles, California. (Photo by Jason Merritt/Entertainment/Getty Images)
Rita Ora, in Lanvin, attends the 56th GRAMMY Awards at Staples Center on January 26, 2014 in Los Angeles, California. (Photo by Lester Cohen/WireImage)
Emma Roberts, in Kate Spade, attends Hollywood Stands Up To Cancer Event with contributors American Cancer Society and Bristol Myers Squibb hosted by Jim Toth and Reese Witherspoon and the Entertainment Industry Foundation on Tuesday, January 28, 2014 in Culver City, California. (Photo by Michael Buckner/Getty Images for Entertainment Industry Foundation)
Gwyneth Paltrow, in David Koma, attends Hollywood Stands Up To Cancer Event with contributors American Cancer Society and Bristol Myers Squibb hosted by Jim Toth and Reese Witherspoon and the Entertainment Industry Foundation on Tuesday, January 28, 2014 in Culver City, California. (Photo by Michael Buckner/Getty Images for Entertainment Industry Foundation)
Reese Witherspoon, in Roland Mouret, attends Hollywood Stands Up To Cancer Event with contributors American Cancer Society and Bristol Myers Squibb hosted by Jim Toth and Reese Witherspoon and the Entertainment Industry Foundation on Tuesday, January 28, 2014 in Culver City, California. (Photo by Michael Buckner/Getty Images for Entertainment Industry Foundation)