Selena Gomez might be in for a rude awakening.

Shortly after photos surfaced of the singer and The Weeknd kissing after a date night, Bella Hadid wasn't the only looking for revenge — cue Drake's "Summer Sixteen" — against her ex.

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A source revealed to In Touch that Selena's former flame was so "upset" over the photos, he took the opportunity to use past hookup Kourtney Kardashian as a shoulder to lean on.

Justin was spotted with Kourt earlier this week at The Peppermint Club in Hollywood earlier this week. As it turned out, the reunion was all part of Justin's elaborate plan to spite Selena.

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Justin and Kourtney in 2016.

“It’s probably only a matter of time before Selena sends Justin an evil text to ask him about his night out,” a source revealed, exclusively. "She's always been jealous of his relationship with Kourtney."

This wouldn't be the first time the 24-year-old tried to intervene in her ex's relationship with the mother-of-three. Over the summer, In Touch learned the singer tried to contact Justin after learning of his hangout with the 37-year-old — except Justin shut her down.

“Justin explained that he is quietly seeing Kourtney Kardashian again," a source previously revealed.

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Further, it appears as though Selena can't help but voice her opinion on Justin's love life. While he briefly dated Sofia Richie, the brunette beauty shaded the Biebs via Instagram — and even accused him of cheating on her. Justin took the high road, and deleted his account in response.

“She’s not over Justin,” the source said. “Justin wants to get under Selena's skin. And he knows how to annoy her — going out with Kourtney was the perfect payback.”

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itw cover — updated