Plus: Britney Spears's poolside night out, John Mayer and more

By People Staff
Updated October 26, 2010 06:00 AM
Michael Buckner/WireImage

• After performing at Justin Timberlake‘s charity concert in Las Vegas, newly single Christina Aguilera was still in the mood to party. The singer took her crew of dancers and close friends to Tao to blow off some steam. Aguilera sported a skintight dress and waved to the crowd from her skybox as the deejay gave her a shout-out, announcing that the “sexiest lady in the world is in the house.” The crowd also snapped pictures of Aguilera, who stayed out until almost 3 a.m.

Britney Spears was enjoying a night out too – at the Mondrian Hotel in L.A. The singer stopped by SkyBar with a younger guy but sans entourage or security. Spears, who sported a green turtleneck, stuck to juice and hung out poolside, occasionally approaching the deejay booth to check out the action as DJ Lindsay Luv spun.

John Mayer went out with his guy friends, hanging out at the Saturday Night Live afterparty at Matsuri inside New York’s Maritime Hotel. The singer and his buddy snacked on a huge platter of sushi and mostly kept to himself, ignoring other revelers like host Emma Stone and Blake Lively. Mayer later whipped out his American Express Black Card and split the bill with his friend.

• Lively, meanwhile, was doing some candle shopping with her Gossip Girl costar and real-life boyfriend Penn Badgley in N.Y. The couple stopped into Henry Bendel’s where they loaded up on the store’s signature holiday candles and also New York City Trash, a white chocolate-covered snack mix.

• It was a Real Housewives bonding session at Red O in L.A. where New York City star Bethenny Frankel was dining with Beverly Hills‘s Kyle Richards. The ladies, who have been friends for years, were seated with a handful of guys, but talked amongst themselves and also laughed and happily chatted up fans who approached.