Parties! The style, stars and scoop from Hollywood's hottest events

Caribbean R&B queen Rihanna brought down the house at Entertainment Weekly’s 100 MUST List party at New York City's Gotham Hall. The chart-topping singer worked the stage in a sexy patent-leather black corset dress as she performed hits like “Umbrella”, “SOS” and “Unfaithful.” Meanwhile, bikini-clad lifeguards kicked back with stars like Amerie, Rachel Hunter and Alan Cumming at the beach-themed blowout bash. “She’s super sweet and really down-to-earth,” said MTV VJ Damien Fahey, who made a special trip to the party just to see Rihanna perform.

Click HERE to see Rihanna and the other stars that made Entertainment Weekly's annual list.