In recent years, Jennifer Lopez has been more concerned with casting judgement over other peoples' careers than her own - quite literally, as she's been a judge on American Idol for the past few years.

With that show coming to an end tomorrow, however, J. Lo's musical ambitions have taken the front seat again.

Although she hasn't released an album since 2014's 'A.K.A', she took up a residency in Las Vegas earlier this year and now is releasing a new single, 'Ain't Your Mama', which she'll debut on the American Idol finale.

Ahead of the full performance, however, she's tweeted a snippet of what the song sounds like, which you can hear below: