They dated on and off for six years, and the pair always seemed like one of the most solid couples in Hollywood.
Unfortunately all good things come to an end, and they announced their split in a joint statement.
At the time, neither really got into detail about why their relationship ended. But in her November cover story for Glamour magazine, Lovato is giving some insight at why the two parted ways.
"Being sick was always a part of my relationship with him; I always had something wrong with me. I needed to let go of that," she explained.
Valderrama was with Lovato through her recovery from her substance abuse issues, and she admitted to HuffPost Live in 2015 that she "wouldn't be alive" had it not been for him. Understandably it seems that her past struggles with alcohol, drugs, and eating disorders came to play a larger role in her relationship.
At the time of their breakup, a source revealed to E! News that Valderrama and Lovato's relationship had taken a turn to "more of a big brother-little sister kind of relationship." While that news was never confirmed, it fits into Lovato's suggestion that she was the one who had to be taken care of.
She also revealed to Glamour that "It was hard to depart from somebody who saw everything," but added that "it may be nice to start fresh with somebody ... I think it’s healthy to be able to start over with someone else."
One person Lovato seems to have no desire to start fresh with is Taylor Swift. The "Body Say" singer has been vocal against Swift in the past and used this interview to make clear that she's got no love for the "Style" singer.
She pointed out the contrast between herself and Swift when it comes to their work as feminists.
Lovato insisted that she's doing the work of feminists, since she's "not afraid" to speak out against gender inequality.
Without dropping Swift's name, Lovato added, "I think in certain situations, certain people could be doing more if they’re going to claim that as part of their brand." She then went on to get at Swift's whole crew. "To be honest, and this will probably get me in trouble, I don’t see anybody in any sort of squad that has a normal body. It’s kind of this false image of what people should look like. And what they should be like, and it’s not real." The interviewer clarified her statement, suggesting Lovato meant "there's just one type of body in that squad." The singer agreed, adding "It's not realistic."
Lovato finished her thoughts on Swift by calling out hypocrisy in her female empowerment stance. "I think that having a song and a video about tearing Katy Perry down, that’s not women’s empowerment."
The comments are just the latest example of Lovato's signature, in-your-face honesty that proves she will continue to dance to the beat of her own drum.