A Schlong Christmas

Question: Who is the only singer to have reached the UK top 50 charts in every single decade since 1950?

My guess was Roger Whittaker.  Was I right?  In any event I used it as a pretext to do my annual Schlong Christmas video.  I would have used last year's, but the ^#$%#@$ pricks who run Smart Video have stopped allowing embedded video if it's my embedded video.  Not only that, they have hijacked every one of my previous videos and added their own pop-up sales crap to them.  Smart Video is the worst web service on th internet, bar none.  Liars and thieves.  They have to be Liberals.  But, hey, Merry Christmas with Roger Whittaker, Mother Superior's favorite singing guy.