Starsky and Hutch - Starsky Singing

It's common knowledge that David Soul had a career as a singer, so maybe it seemed natural to hear "Hutch" sing occasionally on S & H as well. However, people seem quite surprised to see/hear "Starsky" (PMG) sing and play guitar in the episode "Avenger". True, it's the only time we see him play the guitar, and maybe the only time his singing is highlighted, but he actually sings a number of times during the series. I think he can't help himself! I've put together some examples here. Did I leave any out?