Dave Stewart backs daughter Kaya in ‘American Idol’ audition
Eurythmics musician Dave Stewart made a surprise appearance on “American Idol,” and it was a treat for everyone in the room, including his daughter. Stewart, half of the ‘80s pop duo with Annie Lennox, joined his daughter Kaya Stewart as she performed for “Idol” judges Lionel Richie, Katy Perry and Luke Bryan during Sunday’s episode. “Oh wait, what? The backup musician is who?” a shocked Richie asked when he saw the father and daughter walk into the room. “I’m Dave, nice to meet you,” said Stewart, who was holding a…