From "Cougar Town", actress Courteney Cox; “The Bachelor” Juan Pablo Galavis; musical guest Johnathan Rice.

Actress Amy Adams; actress Margot Robbie; musical guests Xolie Morra & The Strange Kind.

From "Modern Family", actress Sofia Vergara; actress Emmy Rossum; musical guest Yuna.

Actress Kristen Wiig; comedian Nick Kroll; musical guests Lord Huron.

From "Jack Ryan: Shadow Recruit", actor Kevin Costner; from "American Idol", judge Harry Connick Jr.; musical guest Michael Kiwanuka.

From "Episodes", actor Matt LeBlanc; from "12 Years a Slave", actress Lupita Nyong'o; musical guests The Fray.

From "August Osage County", actress Meryl Streep; from "HitRECord on TV!", host Joseph Gordon-Levitt; musical guest Jonny Lang.

From "Jack Ryan: Shadow Recruit", actor Chris Pine; from "Shark Tank", participant Kevin O'Leary; musical guest Gregory Porter.

From "NCIS: Los Angeles", actor and rapper LL Cool J; from "Agents of S.H.I.E.L.D.", actress Chloe Bennet; musical guests Vampire Weekend.

From "Rake", actor Greg Kinnear; from "Jack Ryan: Shadow Recruit", director and actor Kenneth Branagh; musical guests Young the Giant.

From "Lizzie Borden", actress Christina Ricci; from "New Girl", actor Jake Johnson; musical guest Danny Brown.

From "Keeping Up with the Kardashians", reality star Kim Kardashian; from "The Bachelor: Sean and Catherine's Wedding", Sean Lowe & Catherine Giudici; musical guest Jason Derulo.

From "NCIS: Los Angeles", actor Chris O'Donnell; player for the NBA Indiana Pacers, Paul George; musical guests The Airborne Toxic Event.

Actor Morgan Freeman; from "Mom", actress Anna Faris; musical guests Mötley Crüe.

From "At Middleton", actor Andy García; chef Norman Van Aken; musical guests Broken Bells.

From "That Awkward Moment", actor Zac Efron; from "The Lego Movie", actress Alison Brie; musical guest Sara Bareilles.

The cast of George Clooney's The Monuments Men

Commentator Bill O'Reilly; Kit Harington ("Pompeii"). Also: Phantogram perform; Jimmy presents the trailer for "Guardians of the Galaxy."

Jonah Hill ("The Wolf of Wall Street"); Willie and Korie Robertson ("Duck Dynasty"). Also: New Politics perform.

Seth Rogen ("Neighbors"); rapper Snoop Dogg. Also: White Denim perform.

Jennifer Connelly ("Noah"); Rohan Chand ("Bad Words"). Also: Sharon Jones and the Dap-Kings perform.

Mindy Kaling ("The Mindy Project"); comedian Jim Jefferies. Also: Dan Croll performs.

Dr. Phil McGraw; "NBA Countdown" host Sage Steele. Also: MØ performs.

Tom Cruise ("Edge of Tomorrow"); Alyssa Milano ("Mistresses"). Boyz II Men perform.

Rapper Curtis "50 Cent" Jackson; Jenny Slate ("Obvious Child"). Also: OneRepublic perform.

NHL Stanley Cup Champions Los Angeles Kings, New York City Mayor Bill de Blasio, Los Angeles Mayor Eric Garcetti, Lena Headey, Music from Jungle

Rising Star's Ludacris, Kesha, Josh Groban, Brad Paisley; Michael Stevens; and musical guest Brad Paisley

Mike Tyson, Music from Young Fathers

2014 NBA Champions San Antonio Spurs’ Tony Parker, Eric Bana, Music from Linkin Park

Dane Cook; Mark Duplass; Trey Songz performs.

Chris Pratt, Zoe Saldana, Dave Bautista, Vin Diesel, Bradley Cooper, Classixx