Simon Cowell Videos

Simon Cowell stopped by THE TONIGHT SHOW WITH JAY LENO last night and spoke about the recent news that Britain's Got Talent star Susan Boyle had been diagnosed with Aspergers. Later, Cowell admitted his biggest regret of his career was failing to sign the Spice Girls.

Orlando Bloom stopped by this week's JIMMY KIMMEL LIVE on ABC to talk about his new film 'The Hobbit: The Desolation of Smaug.' The actor also shared how comedian Joan Rivers welcomed him to his new neighborhood.

Elizabeth Olson stopped by ABC's JIMMY KIMMEL LIVE and talked about about the crush she had on John Stamos while she was growing up on the set of Full House with her sisters Mary-Kate and Ashley.

Billboard's 'Candid Covers' video series, presented by Nikon, is back for its third season. The first installment captures Fifth Harmony performing Rihanna's hit 'Stay' as well as 'Miss Movin' On' at Billboard Studios this month.

Billboard's 'Candid Covers' video series, presented by Nikon, is back for its third season. The first installment captures Fifth Harmony performing Rihanna's hit 'Stay' as well as 'Miss Movin' On' at Billboard Studios this month.

On last night's THE X FACTOR on FOX, Demi Lovato goes from the judges' table to the stage to perform her hit song, 'Neon Lights.'

Viewers were in for a treat when recording superstar Michael Buble stopped by last night's THE X FACTOR. Check out his performance of his hit single 'It's a Beautiful Day' below!

Check out Fifth Harmony, the American girl group which formed on the second season of The X Factor rocking out to 'Better Together' on today's Thanksgiving Day Parade.

The singer revealed Simon Cowell's evil plan to torture all of the Americans at 'The X Factor' by forcing them to work on Thanksgiving.

Below, watch 'The Office' star John Krasinski get pranked with help from HP on ABC's JIMMY KIMMEL LIVE!

The biggest band on the planet just happens to be a group of former The X Factor UK finalists! One Direction returned to The X Factor USA stage for an electric performance of "Story Of My Life."

The biggest band on the planet just happens to be a group of former The X Factor UK finalists! One Direction returned to The X Factor USA stage for an electric performance of 'Story Of My Life.'

'The Voice' coach Adam Levine was just named People Magazine's Sexiest Man Alive and on last night's JIMMY KIMMEL LIVE on ABC, the Maroon 5 frontman officially accepted his award. Check out the appearance below!

The Chew host Mario Batali and Jimmy Kimmel surprised random strangers by cooking for them on last night's JIMMY KIMMEL LIVE on ABC. Check out the clip below!

David Blane went on Jimmy Kimmel Live! last night and gave an impromtue magic show.

On last night's THE X FACTOR on FOX, the Top 12 performed a tribute to Lou Reed with the late rocker's hit, 'Perfect Day.' Check out their incredible performance!

On last night's THE X FACTOR on FOX, actress and recording artist Selena Gomez (“Getaway,” “Spring Breakers”) performed her hit single, “Slow Down,” from her album, “Stars Dance,” and Fifth Harmony returned to THE X FACTOR stage and performed their hit single, “Me and My Girls.”

On last night's THE X FACTOR on FOX, actress and recording artist Selena Gomez ('Getaway,' 'Spring Breakers') performed her hit single, 'Slow Down,' from her album, 'Stars Dance,' and Fifth Harmony returned to THE X FACTOR stage and performed their hit single, 'Me and My Girls.'

It was '80's night on last night's THE X FACTOR on FOX and Broadway vet Rachel Potter, hoping to maintain her spot on Kelly Rowland's Over 25 team, chose to perform the classic Heart song 'Alone.'

Robin Williams was on Jimmy Kimmel Live! last night and it was glorious.