"(You're So Square) Baby I Don't Care" by Elvis Presley

The most successful chart artist of all-time, there's not much to say about Elvis Presley that hasn't already been said a million times. We all know his classic hits, many of which have spent multiple weeks occupying the #1 spot through the 50s and 60s. He almost had a #1 in the 70s, too, when "Burning Love" reached #2 in 1972.

There's a lot of other great tunes buried in his extensive catalog of songs, like this one from 1957.