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 pair sang "This Is Me" and "Wouldn't Change a Thing," 17 years after the Disney Channel original movie was released.