I saw this slightly different B'day wish in the daily mirror for Prince Charles on his turning 60 today
"Happy 60th birthday Prince Charles but long live the Queen"
You can read the article here
Apparently "The mirror" conducted an opinion poll on the future of the English Monarchy with 4200 people and 89% of them wanted the Queen to continue and felt that Charles should wait to become King.
An interesting Birthday wish well summed up in one line by the mirror!