"We’ve been through so much together," the singer said of her fellow Disney Channel alums. "It was really, really great to spend time with them."

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.”

Demi Lovato is revealing what it was like to reunite with the Jonas Brothers. Following Sunday's night kickoff to the Jonas Brothers' Jonas20: Greetings From Your Hometown Tour, which included a special reunion with Lovato,