Wikipedia : This day (June 1, 1991), in Philadelphia, Pennsylvania,, died David Ruffin, an American soul singer most famous as one of the lead singers of the Temptations.
@allmusic : Unfortunately, ever-mounting internal pressures within the group, coupled with Ruffin’s swelling ego, led to his dismissal from the group in late 1968. His solo career got off to a promising start with the powerful ballad My Whole World Ended (The Moment You Left Me),
@allmusic : One of the greatest lead singers the Motown stable ever had, David Ruffin became one of the artistic cornerstones of the Temptations after his lead vocal on My Girl.
@last.fm : Opportunity arose for David to join the Temptations in 1964, with Ruffin taking lead vocals on the huge hit My Girl. With fellow lead vocalist Eddie Kendricks and talented Motown songwriters and Gordy’s promo machine backing them, they were unstoppable.