Carey rules in London while filming a skit for a sketch comedy show. Plus: Paris & Benji, Jay-Z, Britney Spears and more

REASONS TO CELEBRATE

Jay-Z toasts his good fortune at hot spot Lobby Wednesday after a concert in Toronto. The rapper threw back shots with his entourage but what was he celebrating? A $150 million contract with concert promoter Live Nation, getting a marriage license with Beyoncé or both?