This singer was classically-trained, on her way to becoming an opera singer, but it wasn't for her. She debuted as a hard rock singer in the late 70s. This single, from 1983, saw her trying to appeal to pop fans, and the video for it (which tells the story of a runaway) reminds more than one person of Michael Jackson in its choreography. This is her highest charting single in the United States. Who is the singer, what was the song?

(scroll down for the answer)
Pat Benatar and Love is a Battlefield