CDA: B. J. Thomas
An American original! Here he is with another American original, Glen Campbell, singing "Raindrops Keep Fallin' On My Head." I'm not 100% sold on all of Glen's harmonies, but they mostly land on target.
Hearing this song makes me sad for the day when I'll be doing a CDA on my beloved Burt Bacharach. He's 93. A couple other "associated acts" (as they say on Wikipedia):
Angie Dickinson: 89
Dionne Warwick: 80