The stars were out this week, including Rihanna, who hit up the hottest spots in Sin City.
Saturday, the 21-year-old songstress worked the dance floor at the hot new XS nightclub in the Encore hotel. Then on Sunday, RiRi stayed cool in a cabana and recovered at the Hard Rock Hotel's rockin' pool party Rehab. She made her way to JET nightclub in the Mirage Sunday night with her pal, rapper Fabolous.
What else was Hollywood up to over the holiday weekend? Check out this week's Fresh Pix!