‘SNL’ Celebrates Its 100 Digital Shorts With Justin Bieber, Natalie Portman & Justin Timberlake (VIDEO)

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The boys of The Lonely Island recently finished producing 100 digital shorts for Saturday Night Live and celebrated with their famous friends on Saturday’s episode.

Justin Timberlake, Natalie Portman, and Michael Bolton all reprised their roles from previous musical shorts, while Justin Bieber joined SNL player Andy Samberg and writer Jorma Taccone to fill in for Akiva Schaffer, who eventually popped into the frame after directing the whole shindig.

Who else appeared in the star-studded video?

The night’s musical guest Usher and host Will Ferrell also crashed the party. Meanwhile, Jon Hamm appeared in a blink-and-you’ll-miss-it moment.

Watch the video above to see how many famous faces you can spy!