The pop star earned a fortune during his time in the boyband, but now admits he wasted his money on life's luxuries.
MCFadden insists he regrets spending all his cash, but he is now much happier leading a more simple lifestyle.
He tells Britain's Weekend magazine, "(I regret) wasting so much of the money I earned from Westlife. I went through millions of pounds on cars, private jets and lots of rubbish. I have a lot less money now, but I'm far happier."