Former Westlife singer Brian McFadden has slammed the boyband's collaboration with Mariah Carey as "a shambles".
McFadden, who left the Irish group earlier this year to pursue a solo career, believes musicians should only ever team up to record a track together if the moment is right.
And the 24-year-old star still cringes at the memory of Westlife and Carey's cover of Phil Collins' Against All Odds.
He says: "I don't think collaborations should ever be pre-planned. When Westlife did it with Mariah Carey it ended up being a shambles.
"The best collaborations are when you just realise it should be one and it just happens."