June 7, 2011 Photos | Rihanna and Ke$ha Perform At Madison Square Garden Edit Delete Tags Autopost Rihanna and Ke$ha Perform At Madison Square Garden Related Artists Rihanna Ke$ha Source: http://www.mtv.com/photos/?fid=1645685Emmanuelle Vaugier Emmy Rossum Erica Leerhsen Erika Christensen Estella Warren