However, both parties were reportedly keen to keep their relationship secret, and made the decision to not interact on social media so as not to garner attention.
A source told Britain's The Sun newspaper: "Mel met James soon after her marriage ended while she was working in L.A. on 'America's Got Talent'."
"James was single at the time and they hit it off instantly," they continued. "They had a wild fling and loved spending time together, but it ended respectfully."
Mel has not dated seriously since her split from ex Stephen Belafonte, although her relationship with bandmate Geri Horner in their '90s heyday dominated the headlines over the summer after she revealed their lesbian tryst in an interview with Piers Morgan.
He is currently thought to be dating his backing dancer Jessica Grist.