Popular UK boyband The Wanted have passed half a million sales of their single 'Glad You Came' in the USA, Nielsen SoundScan has confirmed. 

The lads are still riding the wave of success across the pond following their sold-out tour, numerous radio interviews and having the track covered by the cast of 'Glee', and now they have reached another milestone Stateside. 

The hit has sold over 560,000 copies in America since its release and it has become the week's third highest-selling digital download. The 'Glee' version of 'Glad You Came' has also debuted on the Billboard Hot 100 at No.90 while The Wanted's original is currently at No.5. 

To celebrate the birthday of Canadian sensation Justin Bieber (March 1), the group shared with him a few words of wisdom to mark his coming of age and explained:

"[On your 18th birthday], it’s traditional in the U.K. to drink as much as possible. [while] obviously being sensible at the same time. We have promised him, next time he’s out in the U.K., we’re gonna take him out and make sure he has the best night of his life.”

Watch their full performance and interview with Z100 below: