On an appearance on The Ellen Show, the host inquired about the song’s subject. “There’s supposedly a song about Nick Jonas,” Ellen stated to Demi, to which the singer said, “Ya know, something that I will always keep to myself is who I write my songs about.”

On Sunday, Demi Lovato joined the Jonas Brothers on stage in New Jersey for the opening night of the JONAS20 tour, dazzling in statement-making rhinestone-covered jeans. For the “Camp Rock” reunion, Lovato, 32, slipped into a pair of slouchy crystal-adorned Acne Studios jeans ($1,400).

The Jonas Brothers have had multiple high-profile relationships over the years. In 2008, Nick Jonas dated Selena Gomez, while Joe Jonas dated Taylor Swift. Gomez recently reminisced about these relationships on an episode of the Therapuss podcast with Jake Shane on August 7.