Demi Lovato Got Comfy With Her 'Girl' Britney Spears

'She is so down to earth,' Lovato reveals on 'Live From MTV' about her onetime 'X Factor' mate.

Not many people can say that they have become good friends with one of their idols, but if you're Demi Lovato, you can.

On last season of the "X Factor," Lovato found herself — to the envy of fans around the world — seated on the judges panel next to one of the biggest names in pop music: Britney Spears.

"That didn't suck at all, just saying," Lovato said during "Live From MTV."

The two hit it off, with Simon Cowell dubbing them the "gruesome twosome." But there were times that Lovato, who admitted the "X Factor" helped her get over personal fears, couldn't even believe that she could now call Spears a friend.

"I had moments where I was so comfortable with her because she is so down to earth," Lovato said. "I had moments where I'm like, 'That's my girl,' and I'm like, 'Oh shoot, that's Britney Spears!' "

Now that Spears has decided to end her judgeship and pursue a residency in Sin City, that doesn't mean their friendship ends there. The "Heart Attack" singer revealed that she will just "have to go see her in Vegas" in the fall.

Until then, Lovato is not only focused on promoting her recently released fourth album, Demi, but also on finding replacement "X Factor" judges for Spears and L.A. Reid, and time is about to run out.

"I am not going to say in this moment today," Lovato said when asked about possible replacement judges. "It's just me and Simon and I'm appreciative of that so whatever happens, happens. I think we are going to have to figure out who it is soon because there are auditions next week, but yeah you want to get it right and it will be really great. Me and Simon have talked, and I'm excited for what he is thinking."

Who do you want to see as a judge on the "X Factor"? Let us know in the comments below!