Negotiating tactic or real threat? That's what eagle-eyed "American Idol" fans were probably wondering on Tuesday after Jennifer Lopez hinted that she might not be back for a third season. Appearing with co-star Cameron Diaz on "Ellen," to promote her upcoming movie, "What to Expect When You're Expecting," Lopez said she's had a blast during two seasons on "Idol," but her time may be up.

"I really do enjoy it," she said after telling DeGeneres she wasn't sure what her future on "Idol" might be. "Now this is my second year -- I don't know if I can go for a third year. I miss doing other things. It really does lock you down, which was nice the first year with the babies being three, but now they're getting more mobile, they're about to go into school ... So I just don't know."

Lopez joined the show in 2010 for season 10 along with Aerosmith singer Steven Tyler and reportedly makes $12 million a season. And while that's $2 million more than Christina Aguilera makes on "The Voice," it is at least $3 million less than new "X Factor" judge Britney Spears will reportedly earn when she makes her debut in the fall.

When MTV News reached out to reps for "American Idol," they had no comment on Lopez's future with the show.

While appearing on "Access Hollywood" on Monday night, Lopez offered some advice to Spears and the other new "Factor" judge, Demi Lovato.
 "I was like, 'Live TV! Eek.' It's a big thing to take on, but I think they're both more than capable to handle it," Lopez said just hours after Spears and Lovato made it official.

"Working with the singers and doing your thing and knowing what you're talking about from experience, and they both have that," she said of translating her music business expertise into judging advice. And, after a season in which some critics have said she and Tyler have been exceedingly easy on "Idol" contestants, Lopez also counseled that it's perfectly OK to root for the good guy.

"You don't have to be tough," she said. "There's not one way to do that, reality TV, and those competition shows [are] about being yourself. It's about being your best self, and I think that's the most important thing."

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