Sports Katy Perry Shows Cleavage At Grammy's February 11, 2013 / 12:52 PM EST / CBS News The 55th Annual GRAMMY Awards - Show The 55th Annual GRAMMY Awards - Backstage And Audience The 55th Annual GRAMMY Awards - Backstage And Audience The 55th Annual GRAMMY Awards - Arrivals The 55th Annual GRAMMY Awards - Backstage And Audience The 55th Annual GRAMMY Awards - Show The 55th Annual GRAMMY Awards - Arrivals The 55th Annual GRAMMY Awards - Arrivals The 55th Annual GRAMMY Awards - Arrivals US-MUSIC-GRAMMY AWARDS-ARRIVALS The 55th Annual GRAMMY Awards - Backstage And Audience