Actress Megan Fox hosts; U2 performs Breathe, Moment of Surrender, and Ultraviolet (Light My Way). Sketches include An Address from Moammar Gadhafi, Bladdivan, Flight Announcement, Russian Brides, Digital Short: The Date, Grady Wilson’s Burning Up the Bedsheets, Weekend Update with guests Jean K. Jean and Judy Grimes, Live Lounge, Biker Chick Chat, Digital Short: Megan’s Roommate, and Your Mom Talks to Megan Fox While You Get Ready.

Live from New York, it’s... Fred Armisen! Sketches include "Obama’s Checklist," "Mostly Garbage Dog Food," "Celebrity Family Feud," "Throw It On The Ground" (Digital Short), "Mike’s Fountainry," "Deep House Dish," "So You Commited a Crime... And You Think You Can Dance?," "International Masterworks," and "Bubble Dresses Backstage." Lady Gaga performed "Paparazzi" and a medley of "LoveGame," "Bad Romance," and "Poker Face."

Live from New York, it’s... Fred Armisen! Sketches include "Obama’s Nobel," "Gilly and Gigli," "Celebrity Ghost Stories," "University of Westfield," "La Rivista Della Televisione," "Tampax to the Max Ladies’ Billards, 1991," "Cooking Al Fresco with Fran and Phil," "Larry King Live," "Brenda and Sean" (Digital Short), and "Debbie Turner Book Signing." Regina Spektor performed "Eet" and "The Calculation."

Actor Gerard Butler hosts; Shakira performs She Wolf and Did It Again. Sketches include The Rock Obama, Fuquay Satin’s Urban Champagne, Game Time with Dave and Greg, Beauty and the Beast, Weekend Update with guests two gay guys from New Jersey, the balloon from Colorado, Gerard Butler, and Tamara Parks, 300, What Up with That? Trina and Thomas, and Daveheart.

Live from New York, it’s... Kristen Wiig! Sketches include "Fox News Election Coverage," "Carter n’ Sons BBQ," "The View," "Firelight" (Digital Short), "Hollywood Dish," "Teens Raising Awareness About Awful Parent Drivers," "Penelope at the Wedding," "Scared Straight," "Best Friends," and "Bunny Business." Taylor Swift performed "You Belong To Me" and "Untouchable."

Live from New York, it’s... Jason Sudeikis! Sketches include "Biden’s in Control," "Today," "Rear Window," "WIIX," "A Lady’s Guide To Throwing a Party" (film), "Dr. Jekyll & Mr. Hyde," "Toilet Encounters" (Digital Short), and "Cloud Watching." The Black Eyed Peas performed "I Gotta Feeling," "Meet Me Halfway," and "Boom Boom Pow."

Live from New York, it’s... Nasim Pedrad and Will Forte! Sketches include "Obama and Hu Jintao," "Movie Trailer Re-Cut: Palin 2012," "Secret Word," "A Girl Like Reba" (Digital Short), "The Mellow Show," "What’s Up With That?," "Thanksgiving Dinner," "Woman To Woman," and "Say Anything." The Dave Matthews Band performed "You and Me" and "Shake Me Like a Monkey."

Gossip Girl’s Blake Lively hosts; Rihanna performs Russian Roulette and Hard (ft. Young Jeezy) Sketches include: Press Conference Crashers, Carter ’N Sons BBQ (repeat from 11-7-09), ESPN Classic: Vagisil Superstars of Bowling 1989, The Situation Room, SNL Digital Short: Shy Ronnie featuring Rihanna, Gossip Girl: Staten Island, Kickspit Underground Rock Festival, Weekend Update with Bill Cosby and Brittany Murphy, Virginiaca Hastings: Skirt Shopping, UPS (two-part sketch), Late Night with Chris Hansen, and The Southern Potato Chip Thief.

Live from New York, it's... Jason Sudeikis! Sketches include "Gov. Sanford, Sen. Ensign, and Sen. Edwards," "Rose Bowl Shoot," "Sue and the Baby," "A Message from the PGA Tour" (three parts), "Middle School Jingle Jam," "Twilight Science Partners," "Yogurt Shop Flirting," and "Doorbells and More." Bon Jovi performed "Superman Tonight" and "When We Were Beautiful."

Live from New York, it's... Fred Armisen and Kristen Wiig! Sketches include "The Lawrence Welk Show," "What Up With That?," "The Kissing Vogelczeks," "The Tizzle Wizzle Show" (Digital Short), "The Manuel Ortiz Show," "Sigma Lambda Omega," "Vincent Price Christmas Special," "Tree Love," "Christmas Gift Meeting," and "Mark Wahlberg Talks to Christmas Animals."

Live from New York, it's... Fred Armisen! Sketches include "The Situation Room," "Thomas Peepers Insurance," "Reel Quotes," "MacGruber" (three parts), "Sexy Shana," "Inside The NBA," "The Haney Project," "Booty Call" (Digital Short), "Scared Straight," and "Barkley's Bank." Alicia Keys performed "Try Sleeping With A Broken Heart" and "Empire State Of Mind."

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," "SNL 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" '

Actor Jon Hamm hosts; Michael Buble performs "Haven't Met You Yet" and "Baby (You've Got What It Takes)," featuring Sharon Jones. Sketches include "State of the Union Address," "Dinner Party Music," "Digital Short: The Curse," "Scott Brown," "Weekend Update" with guests Sonia Sotomayor and Nicole "Snooki" Polizzi, "Game Time with Randy and Greg," "Hamm & Buble," "Closet Organizer," "Court Reporter," "The Bar," and "Barnes & Noble." '

Live from New York, it's... Kristen Wiig! Sketches include "On The Record with Greta Van Susteren," "Gertie's Will," "The View," "Cialis for Threeways," "Grapes," "What is Burn Notice?" "Access Hollywood," "An Even-Tempered Apology from White House Chief of Staff Rahm Emanuel," and "Cadena-Norton Wedding." Them Crooked Vultures (Josh Homme, Dave Grohl, and John Paul Jones) performed "Mind Eraser, No Chaser" and "New Fang."

Actress/musician Jennifer Lopez hosts and performs "Pieces" and "Starting Over." "A Message from Quincy Jones," "Gyne-Lotrimin Ladies World Cup of Curling," "Digital Short: Flags of the World," "Hollywood Dish Interview," "Telemundo's Olympic Games Coverage," "Undercover Celebrity Boss," "Weekend Update" with guests Bobby Moynihan and Gov. David Paterson, "Besos y Lagrimas," "Office Romance," "Smash Mouth," "Car Horns and More," and "Closet Organizer."

Live from New York, it's... Fred Armisen! Sketches include "Health Care Reform is Unpopular," "Grandpa Vogelchek's Funeral," "Executive Suite Bidet," "Zach Drops By The Set" (film), "Today," "What Up With That?," "The Situation Room," and "Pageant Talk." Vampire Weekend performed "Cousins" and "Giving Up The Gun."

Live from New York, it's... Fred Armisen! Sketches include "Health Care Reform is Unpopular," "Grandpa Vogelchek's Funeral," "Executive Suite Bidet," "Zach Drops By The Set" (film), "Today," "What Up With That?," "The Situation Room," and "Pageant Talk." Vampire Weekend performed "Cousins" and "Giving Up The Gun."

Comedian and actress Tina Fey hosts; Justin Bieber performs "Baby" and "U Smile." "Filling Out the 2010 Census," "Duncan Hines Brownie Husband," "CBS Sports: The Masters," "Sarah Palin Network," "Favorite Student," "Weekend Update" with guests the Devil, Aunt Linda, and Tina Fey, "Al Roker's Ruff, Rugged and Roker," "School Dance," and "Lolene."

Live from New York, it's... Fred Armisen! Sketches include "Larry King Live," "Broadview Security," "Today Sponge Women's Weightlifting Championship 1986," "Hip Hop Kids," "The Other Guy" (Digital Short), "Mort Mort Feingold," "Shake Weight Commercial DVD," "Breakfast at Tiffany's," "Teen Talk," "I Got This!," and "Underground Rock Minute." Ke$ha performed "Tik Tok" and "Your Love is My Drug."

Actress Gabourey Sidibe hosts; MGMT performs "Flash Delirium" and "Brian Eno." Sketches include "A Message from the President of the United States ," "The Suze Orman Show," "Who Wants to Be a Millionaire?" "Mrs. Johnson," "Digital Short: Cherry Battle," "I Did It in My Style," "Weekend Update" with guests Judy Grimes, Stefon, and John Mulaney, "Public Employee of the Year Awards," "Alarm Clocks and More," and "Hamilton."

Live from New York, it's... Betty White, Rachel Dratch, Tina Fey, Ana Gastayer, Amy Poehler, Maya Rudolph, and Molly Shannon! Sketches include "The Lawrence Welk Show," "MacGruber" (three parts), "Delicious Dish," "The Manuel Ortiz Show," "Gingey," "Scared Straight," "CSI: Sarasota," "Thank You For Being a Friend" (Digital Short), and "2010 Census Taker." Jay-Z performed a melody of "Real As It Gets," "99 Problems," "Empire State of Mind" (feat. Bridget Kelly), and "Young Forever" (feat. Mr Hudson).

Live from New York, it's... Bill Hader! Sketches include "BP, Transocean, and Halliburton," "Great Day" (Digital Short), "Arizona Evenings," "Hudson Valley High School Swim Team," "Belinda's Birthday Cookout," "Preniva," "Grady Wilson's Intimate & International," "Timecrowave," "Whistle If You Can," and "Scout Sniper School." Tom Petty & the Heartbreakers performed "I Should Have Known It" and "Jefferson Jericho Blues."