Oh, I'm all for Blondie singing "Sail On Sailor" (it's better than "Call Me", for sure;-) ). I prefer it for Blondie not to sing during a Stones concert, though.
Humour aside: Blondie Chaplin is a fantastic artist and I love a lot of his work. He definetely would be a very good opening act for the Stones, one I'd be looking forward to see and hear.