The Lettermen The Lettermen is a musician known for their adult standards, bubblegum pop, easy listening, lounge and vocal harmony group music. Top tracks by The Lettermen Related artists Bobby Sherman Ray Peterson Wishful Thinking Rita Coolidge Lenny Welch Harpers Bizarre Bobby Goldsboro The Cascades Nat King Cole The Four Aces Bobby Vinton Marco Sison The Spiral Starecase Johnnie Ray Pat Boone Lou Christie Mel Carter