He had a long and distinguished writing career, initially for New York artists on the Wand/Sceptre labels such as Dionne Warwick(e) and Tommy Hunt, as well as Gene Pitney before moving to Motown, where he provided songs for Smokey & The Miracles, the Marvelettes, David Ruffin, the Four Tops and Chuck Jackson before hitting the big time with a co-authorship of Marvin Gaye's "What's Goin' On?" and "Save the Children."
Tillman would sing on a total of thirteen Marvelettes singles including the follow-up hits "Twistin' Postman", "Playboy", "Beechwood 4-5789" and "Too Many Fish in the Sea" but not without the group going through some changes.
Horton would later sing lead on Marvelettes' classics such as "Playboy", "Beechwood 4-5789" and "Too Many Fish in the Sea".
Katherine Anderson (born 1944), American Motown singer with the Marvelettes
The Marvelettes' version appears in a bar fight scene in Mean Streets (1973), directed by Martin Scorsese.