The Puppy Love hitmaker has been a keen observer of the hit boy band, who formed on the U.K. version of The X Factor in 2010, but he is convinced they only have a maximum of 18 more months in the spotlight before bowing to the inevitable breakup.
He says, "One Direction are huge and there is real talent there but they have a year, year and a half left. We all know it and I think they know it. But keep your eye on Harry, he has the work ethic. I learnt the hard way that you can't just 'decide' to be a solo artist, but he will make it work."