Description:Jennifer Lopez showed some serious leg at the Grammy awards, ignoring a memo released by U.S. network CBS that asked attendees to dress conservatively. Lopez chose a black dress with a slit that seemed to go on forever, revealing most of her right leg - taking a page from Angelina Jolie's book when she famously posed with her leg front and center at last year's Oscars. On stage, Lopez joked about the suggested dress code.(0:46)