Rihanna left her NYC hotel yesterday afternoon following her late night of partying at the Costume Institute Gala. While she was rubbing shoulders with other stars on the red carpet, Chris Brown was back home in Virginia quietly celebrating his 20th birthday. Rihanna's busy travel schedule has one fewer trip on her itinerary now that her supposed comeback concert in Dubai has been cancelled. She did join Kanye on stage at Monday's big event, getting even some of the most serious fashion folks out of their seats to dance.
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