Nasim Pedrad

Live from New York, it's... Bill Hader!

Sketches include "The Benghazi Hearings," "1-800-Flowers.com," "The Californians," "Aw Nuts, Mom's a Ghost!" "The Lawrence Welk Show," "Target Greatland," "Douglaston Acupuncture," "Eddy's," and "Classy Sexy Elegnace."

Vampire Weekend performed "Diane Young" and "I'm Not Excited."

Live from New York, it's... Kenan Thompson!

Sketches include "Superdome Blackout," "The Californians," "Security Procedures," "Bravo Reality Shows," "Tell Me More," "The Miley Cyrus Show," "Glice," "A Sexy Valentine's Day Message," and "Booker T. Washington High Valentine's Dance."

Justin Bieber performed "As Long As You Love Me" and "Nothing Like Us."

Live from New York, it's... the New York City Children's Choir!

Sketches include "Silent Night," "A Tony Bennett Christmas," "The RoyalGynecologist," "You're a Rat Bastard, Charlie Brown," "What Up With That?" "Restoration Hardware," and "Pageant Audition."

Paul McCartney performed "My Valentine," "Cut Me Some Slack" (featuring Nirvana), and "Wonderful Christmas Time."

Live from New York, it's... Kate McKinnon!

Sketches include "The Vice Presidential Debate," "Gillette Fusion," "The Californians," "Tech Talk," "Give Us All Our Daughters Back!," "Homer's Odyssey," "Washington High Hell-Oween Ball," and "Jillian Chizz Dance Studio."

Passion Pit performed "Take a Walk" and "Carried Away."

Seth MacFarlane/Frank Ocean opened the 38th season of the NBC late night show Saturday Night Live. The singer Psy of the hit "Gangnam Style" made a surprise appearance, and Ocean performed "Thinkin Bout You" and "Pyramids" with John Mayer on guitar. MacFarlane, better known for his behind the camera work on "Family Guy" and "American Dad," appeared as an Amish wooden spoon salesman and a puppet instructor. (see synopsis in recap)

Live fromNew York, it's... Taran Killam!

Sketches include "The Rush Limbaugh Show," "Benihana," "Science Finders" (Digital Short), "J Pop America Fun Time Now," "Dartmouth Primate Research," "Liza Minnelli Tries to Turn Off a Lamp," and "Pachelbel's Canon."

The Shins performed "Simple Song" and "It's Only Life."

Live from New York, it's... Bill Hader!

Sketches include "New York Sports Now," "Bronx Beat," "I Know Why the Caged Bird Laughs!" "Beyonce and Jay-Z's Baby," "What Up With That?" "Super Showcase," "The Obama Show," and "How's He Doing?"

Sleigh Bells performed "Comeback Kid" and "End of the Line."

Live from New York, it's... Jason Sudeikis!

Sketches include "Romney in South Carolina," "Ricky Gervais," "Target Greatland," "You Can Do Anything!" "Spin the Bottle" (film), "Delaware Fellas," "Hogwarts Castle, 2020," "X27B Theater," "Glenda Okones for Mayor" (three parts), "The Jay Pharaoh Show," "New Hampshire Exit Poll," and "Headz-Up."

Lana Del Rey performed "Video Games" and "Blue Jeans."

Live from New York, it's... Jason Sudeikis!

Sketches include "Romney: Raw & Unleashed," "Red Flag," "Replacing Regis," "Kemper-Pedic," "Vogelchek Thanksgiving," "Mitch's Retirement Party," "A New Jack Thanksgiving," "Seducing Women Through Chess" (Digital Short), "Andre the Giant Chooses An Ice Cream Flavor," and "Blue Jean Committee."

Florence + The Machine performed "Shake It Out" and "No Light No Light."

Live from New York, it's... Bobby Moynihan!

Sketches include "Mitt Romney and Chris Christie," "Lincoln Financial Group" (three parts), "Fox & Friends," "The Best of Both Worlds," "V-Necks" (Digital Short), "Shanna's Halloween Party," "Columbus Day A**blast!," "Bruce Springsteen: Just the Stories," and "Tinyballs."

Foster the People performed "Pumped-Up Kicks" and "Houdini."