Live From New York, it's...Madonna

Sketches Include: A Message From Madonna, ""General Dynamics,"" ""Tommy Flanagan,"" ""Quiz Masters,"" ""The Amazing Alexander,"" ""Church Chat,"" ""Bows and Smith Advertising,"" ""Alienses,"" ""Ten Weeks In Jail,"" ""Baby It's Cold Outside"" (musical number), ""Derek Stevens Auditions,"" and ""The Brecht Opera.""

Buster Poindexter performed ""Smack Dab in the Middle"" and ""Fool For You.""

Sigourney Weaver comes back to host SNL after a 24-year gap between appearances (her first appearance was the 12th season premiere in 1986). Indie rock band The Ting Tings perform "That's Not My Name" and "Shut Up and Let Me Go."

Sketches include "Larry King Live," "Grady Wilson's Fifty and Freaky," "Summer's Eve Lady Stars of Darts Championship 1988," "Digital Short: James Cameron's Laser Cats 5," "Disco Booty Junction," "Weekend Update" with Larry the Goose and Meryl Streep, "Avatar," "Riley," "Sigourney Weaver's Internet Addiction," and "Fire and Rice."