Chris Brown and Karrueche Tran shocked fans as they unexpectedly broke up over the long holiday weekend. Now, the reason of the couple's split has been revealed.

The "Loyal" hitmaker shared an extremely racy photo of his on-and-off again girlfriend via Instagram on July 4. The black-and-white image featured her nearly naked body, only wearing a tiny black thong and a matching bra. He later deleted the picture, as well as all of the model's other pictures that he posted on his account.

According to RadarOnline, Brown's revealing snapshot of Tran on his social media account is to blame for the fallout between the two. "Karrueche and Chris are done. They're not speaking," a source said. "It seems she was upset by Chris' photo."

"She didn't want to listen to any Chris Brown music," the source added.

Tran also made the pair's breakup quite obvious by removing all photos of Brown from her account and posting a couple of quote images on Sunday, July 6, which read, "Love what you have before life teaches you to love what you lost," and, "In the end, only three things matter: how much you loved, how gently you lived, and how gracefully you let go of things not meant for you."

The split follows Chris Brown's frustration about Karrueche Tran partying without him, when she went out to gay hotspot Socialite House in West Hollywood on June 23. "Chris was annoyed that she was out. Chris really hasn't been enjoying the club scene as of late," a source said to Hollywood Life. "Kae was in a good mood but spent a majority of the time responding to a lot of his texts. She even stepped outside of the club to take a call ... but when she went back inside, she shut off her phone so she could really enjoy the rest of the night."