She's in party mode.

Last weekend, Britney Spears [Images] hit three hotspots in one night. And now, she's hosting the grand opening of LAX nightclub in Las Vegas [Images] next month.

People magazine reports her madcap night last weekend included visits to Ritual Support Club, Les Deux and Element.

Investors in LAX, which opens August 31 in the Luxor Hotel, include Christina Aguilera [Images] and DJ AM, Nicole Richie's [Images] ex-boyfriend.

She stopped by Ritual Supper Club to celebrate her assistant Alli's birthday, then Les Deux and Element, where she arrived with a group of seven women and went on the dance floor.

Britney's currently working on a new album, but there is no official release date so far.

Photograph: Getty Images