The 24-year-old diva was first linked with Vasconcelos last July, reported People magazine.
"It wasn't a dramatic split. Bomba is a good guy, but the relationship just ran its course," a source confirmed.
Over the last few months, the "Let It Go" hitmaker and the fighter made their relationship Instagram official by posting pictures of each other on the photo-video sharing app.
Lovato has since deleted all the photos of Vasconcelos from her social media.
In June 2016, she split from her boyfriend of six years, Wilmer Valderrama.
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