The singer shows off her "Sasha" side at the MTV Europe Awards. Plus: Diddy & Jay-Z, Scarlett Johansson, Kate Hudson and more

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WOW 'FACTOR'

Mariah Carey and hubby Nick Cannon make a glam arrival at London's Dorchester Hotel on Thursday. The pop star is in the U.K. to perform on a Mimi-themed edition of the talent search, The X Factor.