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Niall has wee problem on live TV

ONE Direction star Niall Horan said he was embarrassed to be caught short during filming for the Jonathan Ross Show.

The singer raised his hand like a schoolboy to ask permission from the show's host, right in the middle of an interview.

The That's What Makes You Beautiful star was being interviewed by the ITV regular alongside his bandmates – Zayn Malik, Harry Styles, Louis Tomlinson and Liam Pane.

"I'm going to embarrass myself ... I really need the toilet," he said.

The presenter of the ITV chat show was stunned at the request by his guest.

"You want to go to the toilet now?" Jonathan asked.

And Niall replied: "If I could possibly do that."

Jonathan then asked if he could hang on for a few minutes as they were almost finished, but added: "The thing is, you can't really enjoy it when you need to go."

Cheeky Niall responded: "To be honest, I wasn't really enjoying it anyway."

The Mullingar native later wrote on Twitter that he was mortified about having to ask to use the bathroom.

He said: "There goes the most embarrassing moment of my life!

"I asked king Wossy could I go to the toilet! You just don't do that! I'm sorry. "But in my defence, I would have never said anything if I didn't really need it! the pain was just madness!"

The Irish star also revealed how he has been lucky with several girls who are attracted to his looks. "They've never seen a blond Irish guy before," he said.

Earlier in the interview the Little Things singer revealed that he takes his clothes of when recording songs with the band.

He said: "It's always really warm in the studio. I recorded What Makes You Beautiful in my boxers. Just comfort."