Mariah Carey is still reeling from her split from ex-fiance James Packer so much so that she's written a breakup ballad about him.

In the series finale of her reality series Mariah's World, Carey debuted the track titled I Don't.

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And in typical Mariah form, it features high notes and dramatic lyrics.

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"Cause when you love someone, you just don't treat them bad. You messed up all we had. Probably think I'm coming back. But I don't, I don't," Carey sings.

Speaking in the episode, Carey said she had turned her heartbreak into a song.

"Ever since the tour wrapped I took some time just to process my feelings, and I started writing a song to express what I've been going through," she said.

Carey and Packer split after a whirlwind romance (and lots of PDA), with Carey keeping the $10 million engagement ring Packer gave her when he proposed.

In November, Carey told The Ellen DeGeneres Show she was philosophical about the split.

"Everything happens for a reason. Things are the way they are," she said.

Carey is now dating her back-up dancer Bryan Tanaka, with the couple sharing a kiss in the Mariah's World finale.