Celebrity pictures: Katy Perry, Nicki Minaj, James Corden
Also in LA, The Wanted's Jay McGuiness and Siva Kaneswaran pose for the paps as they head to LAX airport and The Voice's Christina Aguilera and boyfriend Matt Rutler dine out.
In New York, Jason Segel and Olivia Wilde attend the Tribeca Film Festival opening night of The Five Year Engagement, Modern Family's Sofia Vergara runs errands and James Corden receives critical acclaim at the Broadway opening night of One Man, Two Guvnors.
And in London, a blonde Nicki Minaj leaves her hotel and New Young Pony Club's Tahita Bulmer attends the Casio pop-up store launch party.
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