Christina Aguilera, Cee Lo to Sing at Michael Jackson Tribute Concert

 
Singer Christina Aguilera presents the new fragrance 'Royal Desire' at the Upside East Lounge on July 13, 2011 in Munich, Germany. (Getty Images)more pics » Christina Aguilera (Getty Images) LOS ANGELES (Reuters) - Christina Aguilera, Cee Lo Green and Motown veteran Smokey Robinson will perform at a Michael Jackson tribute concert in Britain in October, organizers announced on