Ariana Grande performs Imagine on The Tonight Show Starring Jimmy Fallon Ariana Today R 2018-12-19 On December 18th, Ariana Grande performed Imagine on The Tonight Show Starring Jimmy Fallon. She also joined Jimmy, Horatio Sanz, Tracy Morgan and Chris Kattan in recreating I Wish It Was Christmas Today. Check out the photos and videos below! Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Google+ (Opens in new window) Related Tags:Ariana GrandeChris KattanHoratio SanzimagineJimmy FallonPerformancestelevisionThe Tonight ShowTracy Morgan