ROB KARDASHIAN SAYS HE CHEATED ON ADRIENNE FROM THE CHEETAH GIRLS!

Rob Kardashian dropped a bomb on Sunday night's episode of "Keeping Up With the Kardashians."
The brother of Kim, Khloe and Kourtney admitted that he and Adrienne Bailon broke up in March because he cheated on her.

Earlier this year, rumors circulated that the couple of two years had split up, but they only confirmed the break up in March.

At the time, a family insider told Life & Style magazine that Kardashian and Bailon had parted ways because their relationship had gotten too difficult.

"They are just so young. She is very career-oriented, and he’s still in school,” he said. “They are still friends, but it’s definitely over.”

Kardashian, 22, who according to his twitter is currently in the studio working on an R&B album, has not addressed the break up until now.

Though he appeared remorseful, the sometimes model did not provide any details on who he cheated with.

Bailon, 26, has since moved on. The former Cheetah Girl and MTV personality has a new boyfriend, whom she was texting during the episode.

The identity of her new boy toy remains unknown for now.

Bailon was a regular fixture on earlier episodes of "Keeping Up" and was a guest at Khloe's recent wedding to Lamar Odom.

No news on what Kardashian will do with the tattoo of Adrienne's name that he had inked on his chest.