Lawrence Welk!

His other catchphrase was "and a one and a two."
He was, of course, the much maligned, Lawrence Welk.
However in 1961, two of his albums spent the entire year on the charts, with Calcutta holding the number 1 spot for 11 weeks. During his unprecedented chart run between 1956 and 1972, no less than 42 albums made the lists.
Personally, I think, his way of presenting songs, interwoven with action, was the inspiration for current music video.
He was actually ahead of his time!