Demi Lovato - Check out Demi, Britney Spears, LA Reid and Louis Walsh (filling in for Simon Cowell) at the Kansas City auditions for The X Factor (USA)!

X Factor substitute judge Louis Walsh gets the thumbs up from Britney Spears, Demi Lovato, and L.A. Reid

Louis Walsh Claims Britney Spears 'Was On So Much Medication' While Filming 'The X Factor

X Factor Auditons Hit Kansas City Without Simon Cowell (PHOTOS)

The X Factor recap: Easy Breezy Wheezy Yes

Demi Lovato - Check out Demi, Britney Spears, LA Reid and Louis Walsh ( filling in for Simon Cowell) at the Kansas City auditions for The X Factor ( USA)!

X Factor Auditons Hit Kansas City Without Simon Cowell (PHOTOS)

X Factor substitute judge Louis Walsh gets the thumbs up from Britney Spears, Demi Lovato, and L.A. Reid

These Are The Best Things — Easy Breezy Face Tattoos

Ara Sale

Britney Spears 'had a lot of problems' during 'The X Factor USA', according to Louis Walsh - RETROPOP

X Factor stars who have died – cancer battle, workplace accident and suicide - Daily Star

Louis Walsh Claims Britney Spears 'Was On So Much Medication' While Filming 'The X Factor