Demi Lovato Calls Simon Cowell “Grandpa” At ‘X Factor’ Taping, Britney Spears Walks Off Set: Morning Mix

:: Demi Lovato and Britney Spears just started their tenure on The X Factor, and they’re already getting along well with their fellow judges. Demi reportedly called Simon Cowell “grandpa” during the Austin, Texas auditions when Simon tried to set her up with a contestant. As inappropriate as ever, Mr. Cowell. [Celebuzz]

:: Britney Spears reportedly walked off the set of The X Factor when a contestant performed a terrible rendition of her song “Hold It Against Me”. Brit claims she “just needed a break.” In the middle of someone’s audition. And this is just the first day, folks. [ONTD]

:: M.I.A. has joined the already-impressive roster at Roc Nation. [Rap-Up]

:: We share Jennifer Lopez‘s reaction when looking at these GIFs of Jennifer Holliday performing during the American Idol finale. [Popdust]

:: Gossip‘s Beth Ditto discusses fashion, Adele, and going from punk to pop. [Vulture]

After the jump, find out which music acts will be hitting the tube today.

Music on TV:

:: Late Show with David Letterman (CBS) — Alabama Shakes (repeat) :: Tonight Show with Jay Leno (NBC) — All American Rejects :: Live with Carson Daly (NBC) — Dev, White Denim (repeat) :: The View (ABC) — Train :: Jimmy Kimmel Live (ABC) — Carrie Underwood (repeat)