Mike and the Mechanics: Hammersmith Odeon. Might as well have been listening to the record and/or they were cardboard cutouts on stage.
Closely followed by Joan Jett and the Blackheads (or whatever they were called). I was taking photos of her, and she had a great big sign on her monitor that said 'Leeds' (which was where we were). When it got to the Hi [Insert Town/City], how ya doin!' she very obviously looked down at her monitor. And that was the highlight of the gig.