Hashtag, Timberlake on Fallon yes please.

Jimmy Fallon has quite the line up for his first week of host as "The Tonight Show"

Check it aht...

Monday, Feb. 17: Will Smith and musical guest U2

Tuesday, Feb. 18: Jerry Seinfeld, Kristen Wiig, and musical guest Lady Gaga

Wednesday, Feb. 19: Bradley Cooper and musical guest Tim McGraw

Thursday, Feb. 20: First lady Michelle Obama, Will Ferrell, and musical guest Arcade Fire

Friday, Feb. 21: Justin Timberlake, as interview and musical guest