Myleene Klass, former Hear'Say singer, exposes ex-husband's cheating during her birthday party.

Former Hear'Say singer Myleene Klass revealed on social media that she caught her ex-husband, Graham Quinn, cheating with another celebrity during her birthday party. Klass, who has "the receipts" to back her claims, expressed that she is now unapologetically honest about her experiences. The couple, who were married from 2011 to 2013, have not disclosed the identity of the other celebrity involved.