Celebrity Pictures: Rihanna, Carey Mulligan, Tom Jones

Today's celebrity pictures include Rihanna in a thigh-high slit gown at the Battleship premiere in Los Angeles with co-star Alexander Skarsgard, and a gothic-looking Katy Perry debuting purple hair at the NARM Music Biz Awards.

In New York, 30 Rock's Tina Fey and Boardwalk Empire's Steve Buscemi attend NYWIFT's 13th annual Designing Women Awards at Macy's, and Benjamin Millepied and Natalie Portman attend the New York City Ballet Spring Gala.

Meanwhile, Kim Kardashian attends the launch of Belle Noel at The Bay in Toronto; and in London newly-weds Marcus Mumford and Carey Mulligan attend the ARK charity gala dinner at Kensington Palace, Oliver Cheshire and Pixie Lott leave Novikov restaurant, and The Voice's Jessie J and Tom Jones leave the 100 Club.

Also, in Manchester, former Corrie star Kym Marsh and Jamie Lomas attend the premiere of the Street of Dreams musical.