Kelly sings "On Top of the World"; Fat Joe; Kristin Chenoweth; Bowen Yang; 9/11 tribute: Kelly goes to the fire zone; multilingual New Yorker; Chris Martin sings with River and Remy.

Kelly sings "Ain't No Mountain High Enough"; Tracy Morgan; Julia Haart; The Fashion Foundation; guitar reunion.

Kelly sings "Valerie"; Tim Gunn New York fashion advice; Connie Britton; Rebuilding Together Philadelphia; Maury Povich and Connie Chung; Mikey Likes It Ice Cream; dewy skin nun.

Kelly sings "What's Love Got to Do With It?"; Amber Ruffin; Big Brothers Big Sisters; Julianne Moore, Ben Platt, Amandla Stenberg, Amy Adams, Nik Dodani and Danny Pino ("Dear Evan Hansen"); Coney Island Wonder Wheel; Bela School; Long Island prodigy.

Kelly sings "Cry Me a River"; Seth Meyers; Kandi Burruss; Long Island House Rehab; wheelchair park.

Kelly sings "Two Princes"; Danielle Nottingham; Ariana Grande; Glennon Doyle; James Wolk ("Ordinary Joe").

Kelly sings "Escapade"; Matt Iseman ("American Ninja Warrior"); Ken Jeong; a Los Angeles non-profit gathers Hollywood catering leftovers for homeless people; Charli and Dixie D'Amelio; Cake Sisters pandemic pivot.

Kelly sings "Fool for You"; Alyson Hannigan; Shaquille O'Neal; Dan Reynolds of Imagine Dragons; La La Land Kind Café update; "Street Love."

Kelly sings "Make Me Feel"; Arsenio Hall; Kristen Bell; Kirby Howell-Baptiste; Jeanie Buss; L.A. middle school music program; hotel linens recycled.

Kelly sings "You Love Me"; Big Boy; Whitney Cummings; "Property Brothers" Jonathan and Drew Scott; Andrea Pitter ("Making the Cut"); a couple hide money at Target for new parents; Chris Martin performs.

Kelly sings "Enjoy the Silence", Curtis "50 Cent" Jackson, Glenn Howerton and Trisha Yearwood join, and ITZY performs.

Kelly sings "My Own Worst Enemy"; Melissa McCarthy; Sydney Sweeney; karate grandma; MorningSave bargains and deals with Lawrence Zarian; world's perfect toddler; Patrick Droney performs.

Kelly sings "River", Joseph Gordon-Levitt and Hannah Waddingham join, Tia Mowry makes pancakes, safety-pin fashion, and Maeta performs.

Kelly sings "Happier Than Ever"; Leslie Jones; Sarah Shahi; Beds for Kids; furniture-making mom; Elton John and Charlie Puth perform.

Kelly sings "Saving All My Love for You"; Demi Lovato; Kathy Hilton; Dogs Matter; inspiring 7-year-old.

Kelly sings a "Step by Step/Whatta Man/Hangin' Tough" medley featuring New Kids on the Block, Salt-N-Pepa and En Vogue; Rick Astley; Jamaican curry chicken; "The Kelly Clarkson Show" merchandise with Fortune Feimster; New Kids on the Block perform.

Kelly sings "If I Ever Lose My Faith in You"; Stanley Tucci; JoJo Siwa; Cristo Fernández; Excited About Reading; teachers' YouTube show; Chris Young performs.

Kelly sings "Save the Best for Last"; Barry Manilow; Marque Richardson and Logan Browning; Cynthia Bailey Halloween cocktail demo; Zyra Gorecki; Simone Biles and Jordan Chiles; 2Cellos perform.

Kelly sings "Wild West"; Shannen Doherty; cancer patient and UPS driver friendship; Brendan Hunt; Peabody, the dwarf horse.

Kelly sings "Tightrope"; LL Cool J; Renaissance Art NYC; "hot cop" Jeff; Melissa Etheridge performs.

International Day of the Girl: Kelly sings "Let's Go to Vegas"; accomplished women; Beth Behrs; Deidre Hall and Robert Scott Wilson; Olympic gold medalist wrestler Tamyra Mensah-Stock and 12-year-old wrestling phenom girl; 9-year-old amputee track star; Maisie Peters performs.

Kelly sings "Real Love"; Selma Blair; Kyle Richards; Daymond John; Treat Day Truck update; STEM statues; Old Dominion performs.

Kelly sings "Mama Said"; Jamie Lee Curtis; Hasan Minhaj; Malia Baker; all-female mariachi band; gator guy; Natalie Hemby performs.

Kelly sings "Dreams"; teacher stops runaway car; Heather Locklear; J.B. Smoove; Elaine Welteroth; Overachiever Kickoff: Brown Bag Lady update; MorningSave bargains and deals with Lawrence Zarian; author Becca Stevens.

Ambush Christmas: Kelly sings "Let's Dance"; David Duchovny; Ms. Pat; Undercover Covers game; author Soman Chainani; man saves baby deer; Aespa performs.

Kelly sings "It's Your Thing"; Ava DuVernay ("Home Sweet Home"); Annabeth Gish; Suni Lee; teen donates scholarship money; Amy Grant performs.

Kelly sings "Welcome to the Black Parade"; Clint and Ron Howard; Melissa Benoist; a teacher helps a student return home; Amir Arison ("The Blacklist"); Scotty McCreery performs.

Kelly sings "Heart of Glass"; "Bridgerton the Musical"; Erin Andrews; "Balls of Sport" rematch; Freida Pinto; Cake by Courtney: Halloween treat; superfans Kate and Dave gender reveal; Parmalee performs.

Kelly sings "I Got You Babe"; Jimmy Fallon; Sutton Foster; cooking demo; We Light Candles; Static and Ben El perform.

Kelly sings "I Wanna Get Better"; Dave Grohl; David Chang and Priya Krishna cooking demo; North Carolina store free lunch; Abigail Breslin (aka "Sophomore") performs.