Our favorite bluesy twosome the Black Keys showed up on 'Saturday Night Live' last night along with host Charlize Theron to help celebrate Mother's Day.
In 2011, a Facebook page was launched petitioning 'Saturday Night Live' to bring in Slipknot as a musical guest. It's hard to believe that the metal phenoms have never graced the 'SNL' stage, as they've brought the hate to 'The Tonight Show With Jay Leno' in t…