Demi Lovato and Ashlee Simpson teamed up in Los Angeles Wednesday night (Sept. 28) for an epic onstage mashup of their respective 2000s singles "La La Land" and "La La." In a video shared by a fan on ...

Demi Lovato’s latest concert featured a very special guest. On Wednesday, Sept. 28, the “Skin of My Teeth” singer, who uses she/her and they/them pronouns, performed at the YouTube Theater in ...

“Please give it up for Ashlee Simpson,” Demi announced through the microphone, which received loud cheers and screams from the audience. Ashlee suddenly rushed onto the stage and started performing ...