A golden buzzer moment? Rising comedian Vincent Marcus took to the stage of America's Got Talent on Tuesday night's premiere (May 26) to perform a spot-on series of impressions that left the crowd and judges in awe.After admitting to judge Howie Mandel that he'd never performed his impersonations in front of a live audience before, the one-time Vine star launched into a rapid-fire number of nursery rhymes as Eminem, Snoop Dogg, Jay-Z and more."The itsy-bitsy spider went up the water spout/ Down came the rain and washed the spider out/ Out came the sun and dried up all the rain/ The itsy-bitsy spider went up the spout again," he rapped as an unmistakable Marshall Mathers before performing "Paddy Cake" as Snoop and a mashup of "Mary Had a.