Guitarist Nina Strauss has heaped praise on Demi Lovato for embracing her rock roots ... self-esteem by stealing theirs' How much of a rock music buff are you? See if you can identify these ...

ET has learned why Demi Lovato decided to perform their song, 'Heart Attack,' at the American Heart Association's event in NYC. Miley Cyrus, Nicki Minaj and Dierks Bentley are all hoping to score ...

Demi Lovato celebrated one year since she got ... Jutes took to his Instagram Stories on Monday to share a photo of him and the Heart Attack hitmaker from their engagement, showing them sweetly ...

"We will get thru this," the pop star wrote on her Instagram Stories on Tuesday, Jan. 21 Stefanie Keenan/Getty Demi Lovato ... them," said the "Heart Attack" musician. Lovato continued: "I feel ...