US singer Smokey Robinson reveals he had extramarital affair with Diana Ross

(From left) Smokey Robinson, Berry Gordy, Diana Ross and Stevie Wonder attend 'Motown: The Musical' opening night at Lunt-Fontanne Theatre on April 14, 2013, in New York City. Photo: TNS

Smokey Robinson is singing like a bird about an old-school romance with Diana Ross.

The Grammy Award-winning singer-songwriter, known for Motown hits such as Tracks Of My Tears and The Temptations classic My Girl, has revealed he had an extramarital affair with the The Supremes frontwoman in the early 1960s.