SELENA GOMEZ has penned an epic new diss-track aimed at a certain no-good man she doesn’t have time for any more.

Hmmm. We reckon this tune might really speak to JUSTIN BIEBER for some reason.

 Shout out to my ex . . . Selena Gomez hits out at Justin Bieber with new diss-track


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Shout out to my ex . . . Selena Gomez hits out at Justin Bieber with new diss-trackCredit: Getty Images – WireImage
The track, written with CHARLI XCX, is called Bad Girlfriend and features ironic lyrics about how the woman takes the blame for a relationship going sour despite the man’s questionable behaviour.

While we don’t want to spoil it for you, feisty Selena sings: “I know I’m not there for you or there when you call. I’m a bad girlfriend/I’m a bad girlfriend.”

A source said: “It’s all about a boyfriend the girl is no longer really into and has finally gotten wise to. It’s tongue-in-cheek and Selena and Charli knew exactly who they were writing about.

 Sassy singer . . . Selena Gomez has had plenty of rows with her ex
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Sassy singer . . . Selena Gomez has had plenty of rows with her exCredit: PA:Press Association

 Ready for new song . . . Charli XCX co-wrote new track with Selena Gomez
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Ready for new song . . . Charli XCX co-wrote new track with Selena GomezCredit: Getty Images
“She sings about how a good girlfriend would just carry on and let their boyfriend walk all over them, with their cheating and whatnot, but she’s changed her ways.

“It will undoubtedly be tweaked but they were really happy with how the songwriting session went and were loving slating their exes.”

Selena and Justin have had a few run-ins since their split.

Their on-off relationship seemed officially over when she posted on his Instagram: “Funny how the ones that cheated multiple times are pointing the finger at the ones that were forgiving.”

 Blue's clues . . . Selena Gomez hits the charts with new, saucy track
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Blue’s clues . . . Selena Gomez hits the charts with new, saucy trackCredit: Splash News
Selena, now dating THE WEEKND, is well rid.