Jennifer Lopez teases her new song 'Ain't Your Mama'

Another reason not to miss the American Idol series finale on Thursday? Jennifer Lopez will debut her new song "Ain't Your Mama" during her performance on Idol's two-hour episode.

In a Facebook live chat, the Idol judge not only announced the exciting news, but also gave a little preview of what her track sounds like. Listen below:

"Ain't Your Mama" will be available on iTunes following the finale, which will crown this season's winner. The three-part finale starts Tuesday night (April 5) with the 90-minute special American Idol: American Dream hosted by Ryan Seacrest. American Idol airs live at 8 p.m. April 6 and 7 on Fox. Former Idols including Jennifer Hudson, Carrie Underwood and Kelly Clarkson are scheduled to appear on the season finale.

Check out the rest of her chat, where she dishes on what her favorite part about being a judge is and what to expect when she returns to her residency show in Las Vegas.