Pool Party Photos: Kim and Kourtney, Michael Phelps and Lance Bass

It’s pool season, so you can cavort with raving beauties or confident dudes in shorts (your choice) as well as celebrities the likes of Kim Kardashian. She launched Wet Republic day club at MGM on Saturday, sipping midori and 7 Up. (Courtesy photos by Denise Truscello/WireImage.)

She said on the carpet there’s no truth to published gossip she’s moving to New York: “They’re all rumors. I don’t know where they come from. Either you’re getting married, breaking up or having a baby."

Lance Bass joined her. He’s been in town all weekend, going to club Tao Friday with a big group.

Her sister, Kourtney, was chatty and sweet on the red carpet Friday night for the opening of new club Gallery and Planet Hollywood. Before clubbing, she ate sliders and an ice cream sundae at Sugar Factory American Brasserie with Scott Disick. (Gallery photo courtesy of Denise Truscello/Wire Image, followed by Sugar Factory photos courtesy of David Becker/WireImage.)

Michael Phelps launched the pool season for Encore Beach Club, with Miss Nevada Sarah Chapman, and posed with these women, all of whom you should ask out on a date. (Courtesy photos by Erik Kabik)

Gold medal breaststroker Amanda Beard launched the pool season at Azure at Palazzo. She ate Wolfgang Puck's margherita pizza, calamari and grilled beef satay, drinking a strawberry daiquiri and pina colada mix called Miami Vice. And she awarded medals to bikini contest winners. (Courtesy photo by Imagesofvegas.com/Jacob Andrzejczak / ISPhotography )

And Jeremy Piven checked out Mumford & Sons Friday at the Cosmopolitan pool. (Courtesy photo by Erik Kabik.)