This Week In Style It's always a fashion show in celebville, but who came out on top in this week's celebrity style stakes? 1. A fitting tribute! The Duchess Of Cambridge wows in a blue ensemble at the WW1 memorial. 2. She's got the X Factor! Cheryl Cole shows off her slick hairdo and a geometric print dress. 3. Katie Holmes isn't afraid to show off her abs in a sheer ruffled blouse. 4. Not so angelic! Pixie Lott flaunts her cleavage in a tailored white suit to launch her new album. 5. '1,2,3..Breathe in!' Mel B squeezes into a chic fitted dress during 'America's Got Talent' finals. 6. Megan Fox displays her lengthy pins in a short white dress at the 'Ninja Turtles' premiere. 7. Kim Kardashian opts for a stylish pastel pink tube dress to promote her range with Ulta.