Justin Timberlake is returning to SNL this weekend, pulling double duty as host and musical guest, and he gets hyped for the gig in this series of short promo clips that go haywire. First, Kenan Thompson misreads Timberlake's enthusiasm, then Thompon bails, leaving Timberlake to fend for himself. Timberlake flips out when a "Suit & Tie" joke goes wrong, and he inadvertently signs an important document when Thompson asks for his autograph.

Q&A: Justin Timberlake on How Acting Shaped His New Album

Timberlake's forthcoming record, The 20/20 Experience, is due out March 19th. He's also touring with Jay-Z this summer.