Video: Tina Fey Is Hot for Justin Bieber on 'SNL'

Justin Bieber reached a career high when he appeared as the musical guest on this weekend’s “Saturday Night Live.” The teen sensation performed “Baby” and “U Smile,” and also participated in a sketch with host Tina Fey, who played a high school science teacher with an unhealthy case of Bieber fever.

“Baby”

“U Smile”

“Teacher” Skit

“School Dance” Skit