76 Trombones - Robert Preston from the musical The Music Man.
Sing Boy Sing - Tommy Sands who married Nancy Sinatra. The song came from his film of the same name.
Sugarbush - Eve Boswell
Some People - Jet Harris and Tony Meehan who broke away from Cliff's Shadows to go it alone with some success
Sare Marais - Jim Reeves. A great South African song
Summertime - The Jamies - not Gershwins great standard from Porgy and Bess
Sorry I ran all the way home - The Impalas
(To listen click the S)