There seems to be a blue theme today, starting with the first birthday,  Harold Melvin, who had Blue Notes:

http://www.youtube.com/watch?v=K2axbXDjYqA

Carly Simon:

http://www.youtube.com/watch?v=EeOqD3uMIRs

http://www.youtube.com/watch?v=fQep8jZJC2o

Ian McDonald played guitar for King Crimson and Foreigner:

Alan Lanier of Blue Öyster Cult:

Brian MacLeod of Chilliwack:

Tim Finn of Crowded House:

George Michael: