Here's a look back at some of this week's best Late Night moments! (All photos by Lloyd Bishop).
Tina Fey put on her best poker face while trying to fool Jimmy during a game of "Box of Lies".
All the single ladies? Stephen Merchant pulled out his best Beyonce impression to take on Jimmy and Joseph Gordon-Levitt in this week's epic Lip Sync Battle.
The Sesame Street muppets joined Jimmy and the Roots for a classroom instruments version of the Sesame Street theme.
Michael J. Fox and Jimmy got close with a little slow dance break on Wednesday's show.
She's back! Our favorite TeenNick star Sara (no "h") hosted a new episode of her hit show "Ew" with her pal Lindsay Lohan.
And Justin Timberlake and Jimmy have gotten really into #hashtags recently. #Forreal #Justtwoguyshangingout #sayinghashtags.