Perry gets colorful in a bright floral blazer while visiting London's BBC 1 studios. Plus: Kristin Cavallari, Fergie, Anna Paquin & Stephen Moyer and more

CUT IT OUT

Rocking a front (and side!) cutout dress, The Hills newest vixen, Kristin Cavallari, makes a sexy appearance on the yellow carpet at the opening night gala of The Wizard of Oz exhibition at L.A.'s Fashion Institute of Design and Merchandising Tuesday night.