Lady Gaga debuts new song "Princess Die" in concert

Lady Gaga played a new song during a concert in Melbourne, Australia on Tuesday night (June 26).

The pop star, who is in the midst of her Born This Way Ball world tour, said she's not sure if the song will end up on her forthcoming album.

"This song may or may not be on my next album but I wrote it a little while ago and I've never ever played it for anyone," she told the crowd. "This song is a little bit sad. And it's in no way reflective of the rest of music on the album, but it's about some of the most deep and personal thoughts I've ever had."

Gaga has said that she's completed her next album and will reveal its title in September.

Watch a video of Lady Gaga performing "Princess Die" via Rolling Stone.

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