Elton turned up at the 100-capacity Fitzherbert pub in Brighton to watch the band as they played an intimate gig.
Joined by his large entourage of security staff and aides, Elton even enjoyed a few drinks at the bar before the performance.
Spokesperson for The Strypes, Niall Walsh said the boys were delighted when Elton showed up at the gig.
"They were stunned when Elton arrived," he said. "The lads were knocked out. It was incredible; he flew in from Singapore and headed directly to the gig. He seemed to enjoy himself. It was a great night."
And Elton isn't alone in his admiration of the Cavan four-piece. They may only have an average age of 16 but the four boys have been wowing critics with their retro singles.
The Strypes are Ross Farrelly (15), Josh McClorey (17), Pete O'Hanlon (16) and Evan Walsh (16).
Their EP Young, Gifted & Blue was released in April of this year and, since then, the band have gone from strength to strength.
The boys are known for their sharp suits, their encyclopedic knowledge of music and their sixties sound, looking to rock and roll legends such as Dr Feelgood and Led Zeppelin for inspiration.
Last week, the boys were listed in Vogue's 2013 Hot List.
It's been a pretty good couple of weeks for the boys -- last week they signed a five-album record deal with Universal Music Group.