E! News has learned that the famous musicians have been "fighting a lot" and that "they're having a lot of issues."
A source close to the couple explains, "The main issue is this: When they met, they were in work mode. They were doing a collaboration and that's where the attraction stemmed from. She was in the studio and he was producing her. She was also coming off some bad relationships where she didn't really feel appreciated as an artist. She felt she and Chad connected on that level."
And now that "the album didn't do as well as they had hoped…they're finding that they're not seeing eye to eye on a lot of things."