VIDEO: SNL & Justin Bieber Do GREASE

On last night's SATURDAY NIGHT LIVE, Justin Bieber and the cast channeled GREASE for their '50's Romance' sketch. Check it out below!

Pop superstar Justin Bieber served as host and musical guest of this week's Saturday Night Live on NBC.

"Saturday Night Live," NBC's Emmy Award-winning late-night comedy showcase, enters its 38th season in September for another year of laughs, surprises and great performances.

VIDEO: SNL & Justin Bieber Do GREASE