Kavana and Adam Rickett could be heading toward a fight due to their past.
The pair have been put in the new boyband 5th Story - also consisting of Dane Bowers, Blazin' Squad's Kenzie and Gareth Gates - for the comeback show, but there appears to be bad blood between the two pop stars and a major bust-up could be looming.
Kavana, 36, has held a grudge against the former 'Coronation Street' star after his manager Nigel Martin-Smith ditched him in 1998 and turned his attention to Adam.
According to the Daily Star newspaper, Kavana said: "I was working my balls off and Nigel was losing interest in me and then I heard there was this new kid on the scene - a guy with abs, blonde hair who was cute. I wasn't getting the time of day off Nigel."
The 36-year-old singer was forced to leave the UK and blames the 35-year-old hunk for destroying his career.
Adam said: "We have never spoken about this. I felt it was my fault you left the UK."
Kavana replied: "Yes. Basically."
Dane added: "You two have got to have a fight."
'The Big Reunion' airs tomorrow (20.02.14) at 9pm on ITV2.
Tagged in Dane Bowers