Rihanna, Ke$ha, and Nicki Minaj Join Forces for Tour


Rihanna will be embarking on her first-ever arena tour this summer alongside two of 2010’s breakout female music artists, Ke$ha and Nicki Minaj. The tour, titled Last Girl on Earth, will make stops in all major North American cities. Meanwhile, Chris Brown was recently seen begging a karaoke club to let him perform just one song. [Music Mix/EW]