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The former Westlife singer said he was only having a "light-hearted conversation" on the radio when he made the comments and insisted that they were not meant to be taking seriously.
Speaking at UNICEF's Soccer Aid event, McFadden told DS: "I made the joke when I was on a radio station in New Zealand.
"Some woman rang in and said my husband wears pink. I was winding her up, saying, 'He must have a dark secret'. But then it got completely taken out of context.
"It went on every bloody gay website in the world and people called me homophobic. It's ridiculous!"
He continued: "It wasn't a big deal on the day, people were laughing. One person got offended, put it on a website and everyone jumps onboard.
"I apologise if I upset anybody, but it was supposed to be a light-hearted conversation."
Soccer Aid, which is hosted by Ant and Dec, airs on ITV on Sunday at 6pm.
