Guitar genie Steve Lukather is most famous as a founding member of Toto, but by the time they got together he was already a hotshot session man, one who kept dishing out unforgettable licks. Everybody remembers Eddie Van Halen’s solo on Michael Jackson’s “Beat It,” but it was Lukather that lent the iconic track its signature riff. And when Olivia Newton-John sexed up her sound for the ‘80s with “Physical,” how far would she have gotten if not for Lukather’s stinging solo?