Westlife may have enjoyed the height of boy band success in the UK, but have revealed that they are still unable to crack America.

Speaking exclusively to London's newspaper, Metro, Nicky Byrne explained their difficulty after a recent radio road show tour:

"We did a promotional tour of the US in 2000. We did a local radio station roadshow in a big football stadium. There were ten acts on and about five people standing at the front barrier, and the rest of the place was empty. I just remember thinking: ‘This is a ball of s***e.'"

The 'Flying Without Wings' stars may be able to sell out arenas on their home turf, but have found that their pop sound isn't as appreciated overseas:

"Our US label sent World Of Our Own to radio stations in LA and New York without our name on it. It got a good response but when they found out who it was they wouldn’t playlist it as they weren’t supporting boy bands."

The setbacks, however, haven't dampened the band's spirits as they aren't giving up just yet:

"We all would have liked to. You never admit defeat."

Watch Westlife talk about their forthcoming tour on a recent episode of This Morning, below: