The Wanted host wild after-party with LMFAO in Vegas… even though at 19-years-old Nathan is too young to drink in the US

The Wanted host wild after-party with LMFAO in Vegas… even though at 19-years-old Nathan is too young to drink in the US

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UPDATED:

00:43 GMT, 22 May 2012

They had put on a stellar performance in front of the who's who of music so it's no surprise that The Wanted were in the mood to party on Sunday night.

The British boy band joined Billboard winners LMFAO to host a wild after-show bash at LAVO nightclub in Las Vegas.

While Max George,23, Siva Kaneswaran, 23, Jay McGuiness,21, and Tom Parker, 23, are all old enough to drink in the US, Nathan Sykes is just 19-years-old.

Let's party! The Wanted hosted a Billboard Awards after party in Las Vegas last night with LMFAO

Let's party! The Wanted hosted a Billboard Awards after party in Las Vegas last night with LMFAO

The legal drinking age in America is 21-years-old.

That didn't seem to matter as the youngest member of the band was on hand to join in the celebrations.

The five-strong boy band arrived at the nightclub looking dapper in the smart suits they had worn at the awards ceremony earlier in the evening.

Age doesn't matter: Despite only being 19-years-old Nathan Sykes joined his band mates performing at the after party

Age doesn't matter: Despite only being 19-years-old Nathan Sykes joined his band mates performing at the after party

Going for it: The boys appeared to be having a great time while up on stage

Going for it: The boys appeared to be having a great time while up on stage

But later on in the night they were seen taking to the stage looking a little bit worse for wear.

LMFAO, who scooped five awards at the ceremony, turned up at the party and performed an impromptu performance in the early hours of the morning.

The Wanted appeared happy to be sharing their party with the hit-makers and onlookers said they were cheering them on as they danced around the stage in celebration.

Gatecrashers: LMFAO turned up to the club and performed an impromptu rendition of their hits in the early hours of the morning

Gatecrashers: LMFAO turned up to the club and performed an impromptu rendition of their hits in the early hours of the morning

Drink to this: LMFAO were keen to make sure everybody in the party was having a good time

Drink to this: LMFAO were keen to make sure everybody in the party was having a good time

Tom was even seen whistling away as he watched on, with a drink in hand of course.

And the Bolton-born singer was more than happy to chat away to female fans and was at one point surrounded by a bevy of beauties.

While the group had started partying following their performance, taking drinks back to their seats only Jay admitted to having a hangover on Monday.

Enjoying the show: Tom was seen whistling as LMFAO performed and he was seen chatting to a bevy of female fans with a drink in hand

Enjoying the show: Tom was seen whistling as LMFAO performed and he was seen chatting to a bevy of female fans with a drink in hand

Enjoying the show: Tom was seen whistling as LMFAO performed and he was seen chatting to a bevy of female fans with a drink in hand

Getting on down: The Bolton-born singer also showed off some of his best and worst dance moves on stage

Getting on down: The Bolton-born singer also showed off some of his best and worst dance moves on stage

The rest of the band were tweeting about how amazing it was to meet Stevie Wonder backstage at the show.

Siva described the singer as a 'legend' and the band were all in awe after hearing him and Alicia Keys perform at the ceremony.

Exciting the crowd: The boyband performed at the Billboard Awards on Sunday

Exciting the crowd: The boyband performed at the Billboard Awards on Sunday

New friend: The boys even posed for a photo with Carly Rae Jepsen

New friend: The boys even posed for a photo with Carly Rae Jepsen