Adrienne Bailon and Rob Kardashian were one of reality TV's favorite couples when they dated in 2007. Their relationship, which was shown on Keeping Up With the Kardashians, ended in 2009, but do they talk now?

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Although, Bailon and Kardashian used to keep up, it seems like Bailon is on the outside of Kardashian's recent weight issues. "I have no idea," Bailon told Us Weekly about Kardashian's recent struggles. "I don't know anything about [the rumors]."

Us Weekly had previously reported that Bailon was dishing with Kardashian BFF Jonathan Cheban about the youngest Kardashian sibling. "Their conversation was intense and serious," an observer told the magazine. "Jonathan was telling Adrienne she should reach out to Rob. He seemed concerned for him. Adrienne looked really sad -- she was shaking her head, as if she didn't know what to do or say about the whole thing."

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Kardashian left his sister Kim Kardashian's Italy wedding to Kanye West early reportedly due to insecurities about his weight. Rob immediately went home to California and started to work out again with his trainer Gunnar Peterson.

"He's such a good guy," Peterson told E! Online. "Rob was a solid basketball player, a serious runner and he's a serious athlete. It's when life gets in the way, that's what makes it hard to get to the gym." Peterson continued to say that Rob has a lot going on in his life including his business ventures, like his Arthur George sock line.

"Rob is such a solid guy, when he gets in here. I don't care if he weighs 50, 100 or 200 pounds," Peterson continued. "He works like an athlete. He never tries to beg out of a set. He never tries to hop off the cardio a minute or two before. He goes the distance every time."

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Rob kardashian, Adrienne bailon, Keeping Up With The Kardashians