For his first song, Shelton took on Taco's "Puttin' On The Ritz" adding a little bit of class to the battle. Handing his glass of champagne over to Fallon, he ended with a little soft shoe.

While a hard act to follow, Fallon attempted to do so with Ellie Goulding's "Burn," complete with his own spinning dance moves. And Gwen Stefani took us back to 2012 with her rendition of Carly Rae Jepsen's "Call Me Maybe."

In the final round, Shelton showed off with a little Starship "Nothing's Gonna Stop Us Now," Fallon went really old school hiccuping through comedian Spike Jones' song "Cocktails for Two."

But it was Gwen who brought it all home with "Endless Love" by Lionel Richie and Diana Ross. Gwen took on Lionel's part while Blake made a cameo as Ms. Ross.