Kaskade performs at Marquee Nightclub.

Rihanna was spotted at Marquee Dayclub at the Cosmopolitan of Las Vegas on Saturday. The flame-haired chart topper was easy to spot as she stood in front of her cabana in a teeny yellow bikini barely concealed by a black crochet cover up. Pool goers could not take their eyes off of her as she took in the sounds of BT manning the deejay booth.

Actor Justin Bartha and Landry Fields of the New York Knicks were also seen checking out the Dayclub scene.

Celebrity spotting continued Saturday night as notable names checked out headliner Kaskade at the nightclub. Justin Barth returned to experience Marquee at night. The Hangover Part II actress Jamie Chung hit the hot spot with friends while Reggie Bush took over a VIP table on the dance floor and was wearing “I Love Kaskade” sunglasses. Rapper Nas was in the club and tweeted, “Shout out to my man @kaskade killin Marquee right now,” and Jillian Michaels stopped by the Library at Marquee after spending the evening at Tao Nightclub at the Venetian.

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Kaskade performs at Marquee Nightclub.