bspears041311_01_X17.jpgBritney Spears car shots Mercedes G 550 G wagon

Britney Spears was spotted leaving the dance studio in North Hollywood this afternoon, and the pop princess is already busting her booty rehearsing for her Femme Fatale tour. It was announced on Monday that Nicki Minaj will be the opening act for the 8-week concert series, which kicks off June 17 in Sacramento and wraps up August 13 in Toronto.

Can't wait to check out Queen B's moves this summer!