When does a boy band become simply a band? Well, in front of thousands of screaming fans at London's O2 arena, The Vamps may well have just crossed that line.
Yes, they have the boyish, cheeky looks that have been the requisite of modern boy bands since the days of Take That, and, yes, the bulk of their fanbase is made up of pre-teen girls and their mums, but these guys are not just a quartet sitting on stools with microphones glued to their hands, they are genuinely talented musicians.
Lead man Brad shows he is just as good on the guitar, keyboards and even drums as he is belting out their perfectly crafted pop tunes, which include five top 10 singles, while James (guitar), Connor (bass) and Tristan (drums) also got to show off their proficiency with their instruments.
Two of those top 10 songs, Can We Dance and Last Night, are played towards the end of the set and get the best reception (ie screams) from the besotted crowd, but even before this the atmosphere hardly ever dropped below hysterical.
It's not surprising, though, with the energy the band put in to the show, with fireworks (literally), shooting flames and a stage which stretches into the crowd ensuring the band, even the drummer, are not glued to the same spot throughout.
They're not afraid to offer up a few surprises either. James and Connor take centre stage at one point to deliver two songs, Written Off and Risk It All, with just acoustic guitars, they bring out label mates New Hope Club to perform Cecilia with them and support act Conor Maynard makes a cameo appearance on I Found A Girl.
But perhaps the most impressive was an immense drum solo from Tristan, complete with rising platform and blasts of dry ice.
Just add a rollercoaster and you've got a young version of the great rock drummer Tommy Lee, of Motley Crue fame.
A medley of chart songs from other bands/singers also goes down well with the fans, although highlights the fact they haven't quite got the depth of material needed for a 90-minute set yet.
Brad did announce the band have got their third album in the pipeline though and with shows and a fanbase like this, the chance of it hitting the top spot in the charts have never been greater (they haven't had a number of one in either the singles or albums charts yet).
This current tour leads the boys eventually to South America and perhaps onto world domination.
With amazing live shows such as this and more material on the way, they could make it as one of the greatest (boy) bands on the circuit right now.
Got a hankering to watch some live music now? See Hayes FM DJ Hughie Dixon's recommendations on acts to see this weekend .