Only the most gut wrenchingly beautiful and sorrowful cover, why?
Bobby Darrin, "Mack the Knife." [T]he standard from Kurt Weill's Threepenny Opera, was given a vamping jazz-pop interpretation. Although initially opposed to releasing it as a single, the song went to No. 1 on the charts for nine weeks, sold two million copies, and won the Grammy Award for Record of the Year in 1960." [Wikipedia]