Ferrell reprised his famous character in the cold open, playing former President George W. Bush. Watch!
The "Old School" star then brought his own mother on stage to express his love for her… via san cue cards for his Mother's Day monologue.
"SNL's" 100th digital short also welcomed back some of its favorite guest stars including Justin Bieber, Michael Bolton, Natalie Portman, Justin Timberlake, and digital sort guru Andy Sandberg.
Watch Usher's sizzling musical performance!
Actor Will Ferrell returned to his "Saturday Night Live" stomping grounds, to host for the third time, in the show's 100th digital short Saturday night.