Alex Pall, one half of EDM duo The Chainsmokers, is in big, big trouble.

Pall's girlfriend, Tori Woodward, caught him cheating and took to Instagram to expose him!

"They'll look you in the eyes and tell you they love you," she captioned a video of Pall kissing another woman. "Then destroy you without a second thought."

...But Tori wasn't done yet.

The scorned ex went off on Pall in a series of following story posts, writing, "After hours of begging him for scraps of honesty I chipped away just enough to confirm that this is not the first time he's remorsely cheated on me."

"That 'psycho b*tch' from Vegas, the 'lame Instagram model' caught on video and countless others he looked me in the eyes and swore on his life he never touched..."