Signing in veteran musician Steven Tyler and pop queen Jennifer Lopez has earned the 10th season of the 'American Idol' improved ratings but Lopez' stay in the next season seems dubious.

Tyler signed a multi-year contract that will ensure his return for the 11th season alongside original judge Randy Jackson. But Lopez, who signed for significantly less money (a reported 12 million dollars), seemed not so sure of her future.

"It's too early to tell," the Fox News quoted the 41-year-old singing sensation as saying.

Lopez is believed to be in negotiations with the network, and an offer is said to be on the table.

"Everyone has multiple year contracts; Jennifer had single year contract, we loved having her, the hope and expectation is she'll return," said Fox Chief Peter Rice.