VEGAS PHOTOS: Ke$ha looks wild; J Love pretty; Corey; Vienna; '90210'

Ke$ha showed up here Saturday with backup dancers, all decked out in animalistic costumes (as you can see), even though it was, like, 115 degrees at Mandalay Bay's Moorea dayclub pool. Courtesy photos by Erik Kabik/Retna. All of these photos are from Saturday.

Meanwhile, over at MGM's Wet Republic dayclub and pool, AnnaLynne McCord of "90210" celebrated her 23rd birthday with boyfriend Kellan Lutz of "Twilight." Her hot sister Angel was there too. Courtesy photos by Ethan Miller/Getty Images.

"Bachelor" winner/loser Vienna Girardi started her newest single life at Tao Beach with friends. From left: Ashleigh Hunt of the "Bachelor," Chelsea Rae, Christine Collins, Vienna and Amber Lancaster from some MTV show. (She also partied with Miss Florida Rachel Todd and Jesse Csincsak, once of "The Bachelorette.") Courtesy photos by Denise Truscello/Wire Image.

Corey Taylor of Slipknot performed solo acoustic at Wasted Space at the Hard Rock on Saturday night. Here he is with wife Stephanie Luby (left) and Brenna Gray (whose husband, Slipknot bassist Paul Gray, died this year). Courtesy photo by Hew Burney/Hard Rock.

And Jennifer Love Hewitt represented at the Palazzo's Azure pool. She was lovely. Courtesy photos by ISPHOTOGRAPHY/IMAGESOFVEGAS.COM.