Sponjetta Parrish got the surprise of lifetime last night during her swan song performance on NBC's variety show 'America's Got Talent' when T-Pain walked on stage mid-song.

When Sponjetta auditioned earlier in the season for judges Howie Mandel, Sharon Osbourne and Piers Morgan, performing her hand-waving anthem 'Up in My Studio,' things didn't go so well for the aspiring femcee. While the panel of judges gave her the axe, host Nick Cannon thought the opposite of her vocal chops. Cannon brought Sponjetta back on last night's season five finale, which crowned hatted crooner Michael Grimm the winner, where she performed 'Up in My Studio' with Cannon and surprise guest T-Pain. Sponjetta's reaction when T-Pain takes the stage is priceless. Check out the show footage after the jump and for more Sponjetta outtakes head over to her Facebook page. Somewhere in the world William Hung is jealous.