Nineties pop star Tiffany has outed former New Kids on the Block singer Jonathan Knight as gay.

Talking on bi – not gay – cabler Bravo's late night chat show Watch What Happens Live, Tiffany told her host Andy Cohen that Knight was gay.

When Cohen asked if Tiffany had ever dated any members of the boy band, she confessed that she once dated “the quiet one, the shy one,” then added, “He became gay later.”

“Did you turn him?” Cohen prodded.

“No,” she replied. “See I had issues with that, I was thinking maybe I did.”

“Now looking back when we were dating he was so much fun,” she said. “We used to do facials together. He was so easy to talk to and he was fabulous.”

After New Kids on the Block – which featured Donnie Wahlberg, Joey McIntyre, Danny Wood and Knight's younger brother Jordan Knight – 42-year-old Knight turned to a career in real estate and has rarely spoken to the media.