Boyzone star Ronan Keating was allegedly having an affair with a backing dancer for seven months.
The Gave It All Away singer, who last week announced he was splitting from his wife, Yvonne Keating after 12 years of marriage is said to have had a fling with Francine Cornell for nearly a year.
A source told The Sun: "Francine had become quite indiscreet. She told more than one friend this year she couldn't date other men as she was with Ronan. It was as if she wanted people to know."
They added: "By that time they'd been having an affair for months - it had become an open secret in the dancing community."
Keating is said to be 'devastated' by the break down of his marriage with a 'friend' of the love rat also claiming: "He's in bits - embarrassed and ashamed. He's saying he'll do whatever it takes to get Yvonne back. He'll beg on his knees."
However, Yvonne has reportedly claimed that she will not take Ronan back as the source continued: "She isn't going to crumble on this. They had a pact never to cheat. Ronan really has little hope of saving the marriage."
Meanwhile, Ronan was back to work over the weekend performing his first gig since news of his infidelity broke.
Keating, 33 took to the stage still wearing his wedding ring at SkyDance festival in Zurich and is said to have 'choked back the tears' as he tried to perform.
After his set, the love rat stated: "Thank you, until the next time. Life truly is a rollercoaster."
Ronan is now expected to return to Ireland today to have crisis talks with his 36-year old wife who he has three children with.
He is also thought to have cancelled all other work commitments in a bid to win back the former model."
Watch MTV News on the hour every hour on MTV - Sky Channel 126 and Virgin Channel 311