Helen Mirren (Collateral Beauty (2016)); James Marsden (Westworld (2016)); The Weeknd performs; guest DJ Stephen Boss. ...

Mariah Carey (Mariah's World (2016)); Leah Remini (Leah Remini: Scientology and the Aftermath (2016)); 4-year-old Brielle Milla; guest DJ Stephen Boss. ...

Lauren Graham (Gilmore Girls: A Year in the Life (2016)); Sting performs; guest DJ Stephen Boss. ...

Emma Stone (La La Land (2016)); Martha Stewart, Snoop Dogg and Miley Cyrus play Game of Things; guest DJ Stephen Boss. ...

Rob Lowe (Code Black (2015)); guest DJ Stephen Boss. ...

Jennifer Lawrence and Chris Pratt (Passengers (2016)); presidential expert Macey Hensley attends the 50th Annual CMA Awards: guest DJ Stephen Boss. ...

Julie Bowen (Modern Family (2009)); rappers Eben Nettles and Umar Abrams; guest DJ Stephen Boss. ...

Warren Beatty (Rules Don't Apply (2016)); Mandy Moore (This Is Us (2016)); Chicago Cubs players Kris Bryant and David Ross; guest DJ Stephen Boss. ...

Heidi Klum (Project Runway (2004)); Beth Behrs (2 Broke Girls (2011)); Xavie Ford (aka Zay) performs; Ariana Grande and executive producer Andy Lassner go through Univers ...

Ricky Gervais (David Brent Songbook, David Brent: Life on the Road (2016)); 6-year-old presidential expert Macey Hensley; Kenny Chesney performs; guest DJ Stephen Boss. ...

Miley Cyrus (The Voice (2011); viral video stars Lyric and Melody Hurd; guest DJ Stephen Boss.. ...

Anna Kendrick (Trolls (2016)); Martha Stewart and Snoop Dogg (Martha and Snoop's Potluck Dinner Party (2016)); Donald Glover (Atlanta (2016)); Niall Horan performs; guest ...

Vince Vaughn (Hacksaw Ridge (2016)); Priyanka Chopra (Quantico (2015)); Joseph perform. ...

Zooey Deschanel (Trolls (2016)); deaf-blind high school athlete Marvin Pearson; James Hinchcliffe and Sharna Burgess (Dancing with the Stars (2005)) perform; guest DJ Ste ...

Hillary Clinton, Democratic presidential nominee; Bryan Cranston (In Dubious Battle (2016)); guest DJ Stephen Boss. ...

Taye Diggs (Empire (2015)); Sarah Hyland (Modern Family (2009)); 5-year-old cancer survivor Violet Spatoro; a performance by Bastille; guest DJ Stephen Boss. ...

Kat Dennings (2 Broke Girls (2011)); Morris Chestnut (Rosewood (2015) and When the Bough Breaks (2016)); OneRepublic perform; guest DJ Stephen Boss. ...

Christian Slater (Mr. Robot (2015), King Cobra (2016) and Milo Murphy's Law (2016)); guest DJ Stephen Boss. Also: The Clairvoyants (America's Got Talent (2006)) perform; ...

Viola Davis (How to Get Away with Murder (2014)); 7-year-old rapper ''Young'' Dylan Gilmer; Damon Wayans (Lethal Weapon (2016)); guest DJ Stephen Boss. ...

Comic Seth Rogen; Carrie Underwood performs; guest DJ Stephen Boss. ...

Guest co-hostess First Lady Michelle Obama; Golden State Warriors' Stephen Curry; Bradley Cooper; Usher Raymond (Hands of Stone (2016)) performs. ...

Tom Hanks (Sully (2016)); 2-year-old singer Violet Ogea and her mother; Ellen surprises a Louisiana middle school that was severely affected by a flood; guest DJ Stephen ...

Eddie Murphy (Mr. Church (2016)); Tony Marrero, a victim of a nightclub shooting in Ontario; Alessia Cara performs. ...

NBA star LeBron James; Olympian Aly Raisman and her parents; Jared Haibon, Ashley Iaconetti and Caila Quinn (Bachelor in Paradise (2014)); Ellen goes to the mall with Bri ...

Oprah Winfrey (Queen Sugar (2016)); Channing Tatum performs; Olympian Simone Biles; guest DJ Stephen Boss. ...

Eric Stonestreet (Modern Family (2009)); Daniel Craig (Spectre (2015): guest DJ Stephen Boss. Also: 9-year-old piano prodigy Harmony Zhu performs. ...

Guests include author Khloé Kardashian (book, Strong Looks Better Naked); John Bughaw; guest DJ Stephen Boss. Also: Ed Sheeran and Rudimental perform their duet, Lay I ...

Kerry Washington (Scandal (2012)); Justin Bieber; guest DJ Stephen Boss. ...

Seth Rogen (The Night Before (2015)); Justin Bieber; 11-year-old racecar driver MacKenzie Marsh. Also: a performance by Leon Bridges. ...

Will Smith (Concussion (2015)); a performance by Greyson Chance; guest DJ Stephen Boss. ...

Michael Keaton (Spotlight (2015)); Little Mix perform; guest DJ Stephen Boss. ...

David Spade; Giada De Laurentiis; and a 9-year-old Idaho boy who was born with half a heart. Also: performances by 'iHeartMemphis' and Brett Eldredge. ...