Backstreet Old Boys and Elderly Kids on the Block! The "boy" bands show their age as they huff and puff on stage in Liverpool

Backstreet Old Boys and Elderly Kids on the Block! The 'boy' bands show their age as they struggle with their moves on stage

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UPDATED:

00:10 GMT, 24 April 2012

As fresh-faced teenagers, they could create a wall of sound from their fans' screams as they jumped, bopped, moonwalked and flipped around on stage as the nubile and fit young men that they were.

But twenty years on and the New Kids on The Block proved they were more Elderly Men on the Stage as they greeted their fans in Liverpool on their tour last night.

And their fellow pop stars Backstreet Boys, who they have joined forces with for the tour, didn't fair much better as they looked a little slower on their feet than a couple of decades ago.

Not a Zimmerframe in sight: But 25 years since they first dominated the charts, the New Kids on The Block and the Backstreet Boys looked less like the agile young men that used to bounce around on stage

Not a Zimmerframe in sight: But 25 years since they first dominated the charts, the New Kids on The Block and the Backstreet Boys looked less like the agile young men that used to bounce around on stage

It's hardly surprising, what with the oldest member of New Kids being Jon Knight, who is 43, and the youngest being Joey McIntyre, aged 39.

And while their stage buddies hit the charts six years after they did, they were hardly giving Justin Bieber a run for his money either.

Can you remember the words The New Kids sung a few of their hits on their own...

Can you remember the words The New Kids sung a few of their hits on their own…

... and sent their fans into a frenzy as they performed the moves - albeit a little less energetically - that made them chart toppers back in the 80s

… and sent their fans into a frenzy as they performed the moves – albeit a little less energetically – that made them chart toppers back in the 80s

Not that it mattered to the thousands of
screaming girls – who are actually now women about the same age as
their former idols – in the Echo Arena.

In fact, it could have been the late Eighties all over again when the New Kids – Joey, Jon, his brother Jordan, 41, Danny Wood and Donnie Wahlberg, both 42, both came on stage.

Been in the gym much The guys flashed their torsos which probably caused a few fainting fits in the front rows

Been in the gym much The guys flashed their torsos which probably caused a few fainting fits in the front rows

Hanging tough or stuck in that position The boys looked a lot more awkward trying to dance like they did as teenagers

Hanging tough or stuck in that position The boys looked a lot more awkward trying to dance like they did as teenagers

They treated their former, and current, fans to a medley of their hits including Hangin' Tough, You Got it (The Right Stuff), Step /04/24/article-2134222-12BC09C0000005DC-745_634x452.jpg” width=”634″ height=”452″ alt=”The old boys club: led by Backstreet Boy Brian Littrell, all members of both bands merged on stage for their opening number” class=”blkBorder” />

The old boys club: led by Backstreet Boy Brian Littrell, all members of both bands merged on stage for their opening number

The BSB also came on and sung separate to their peers, sending their fans into a frenzy with some of their biggest hits including I Want It That Way and Backstreet's back.

Liverpool was their first English date having played Belfast and Dublin this weekend.

Their European leg comes after the hugely successful NKOTBSB tour in North America in August and September.

Oh my god, we're back again: The Backstreet Boys (L-R Brian Littrell, A.J. McLean, Nick Carter and Howie Dorough) took to the stage for their own selection of hits

Oh my god, we're back again: The Backstreet Boys (L-R Brian Littrell, A.J. McLean, Nick Carter and Howie Dorough) took to the stage for their own selection of hits

Maybe the leathers were a mistake: Although he is a baby of the band at 32, Nick Carter still looked like he was struggling

Maybe the leathers were a mistake: Although he is a baby of the band at 32, Nick Carter still looked like he was struggling

Maybe the leathers were a mistake: Although he is a baby of the band at 32, Nick Carter still looked like he was struggling

Although
both massive during their heyday, the two five-pieces never overlapped,
with NKOTB disbanding when Backstreet were starting to make waves in
the music industry.

NKOTB bandmember Donnie Wahlberg, 42, said: 'Our fans want us overseas, so that is what we will do.

'We have such dedicated fans, and they
continue to come out for us time and time again. Our international fans
have been flying to see us stateside for years, so now we are coming to
them.'

Not planning another tour after this then A.J looked like he'd rather be anywhere else than working up a sweat on stage

Not planning another tour after this then A.J looked like he'd rather be anywhere else than working up a sweat on stage

Not planning another tour after this then A.J looked like he'd rather be anywhere else than working up a sweat on stage