I will happily eat my smelliest pair of socks if Brian Douglas Wilson was lipsynching Sunner's Gone at Wembley. I was there and I have a recording.
As was I, but I was just utterly gobsmacked by the songs sudden appearance and how good he sounded - just wonderful. I had a similar reaction at the Gershwin gig I saw, it's so good to see Brian 'on'.
Wasn't insinuating he was lipsyncing, just marvelling at the quality of the performance!