Paul Williams of the Temptations, singing For Once In My Life by Ron Miller and Orlando Murden. The tune was originally composed for the Motown label, and Stevie Wonder's version made it famous, but it has been performed and recorded by a variety of other outstanding artists. This live rendition, Williams's most famous, is from December of 1968.
The performance is monumental and triumphant! It's a cruel irony that Williams himself died at age 35 from a self-inflicted gunshot wound. He had been experiencing marital problems at the time, and struggled his whole life with Sickle-Cell Disease.