Jedward are the latest to sign up for the benefit night for Aslan frontman Christy Dignam, who is battling cancer.
The Lucan twins are the unlikeliest and latest addition to Night For Christy, in the Olympia on June 21.
However, even more bizarre is that rockers Aslan will be providing the musical backing for the brothers in the theatre where they normally do panto.
"Jedward backed by Aslan? To quote one of our biggest hits, It's A Crazy World, but yes, it's true," Aslan guitarist Billy McGuinness told the Herald.
"John and Edward approached the committee organising the Christy show and asked if they could help and we agreed.
"We're grateful to have them on the bill. Aslan fans should be, too, and the band will be rehearsing with Jedward next week, which should be interesting."
Having Jedward performing on the night has added to worldwide demand for streaming of the event.
So far, more than 100 establishments worldwide have signed up for the live stream of the concert, which will be seen in venues in locations as far apart as Dubai, South Africa, Australia, Canada, and the UK as well as across Ireland.
Many of the locations are venues around the world where Aslan have performed over the years.
McGuinness explained why the band have decided to stream the concert.
"With the gig selling out in a few hours, a lot of fans who have supported the band for years were not able to get tickets.
"This type of gig will never happen again, so it's great to give people a chance to see it by streaming it live from the Olympia," he added.
The special show will feature well-known names stepping into the shoes of Christy Dignam to give their own interpretation of Aslan songs.
The night will see Mark Feehily giving his first post-Westlife solo appearance along with Bressie, Danny O'Reilly, Horslips, Ryan Sheridan, Paul Brady, Shane MacGowan, Mary Black, Don Mescall, Tom Dunne, Something Happens, Jerry Fish, Steve Wall The Stunning, Gavin Friday, and Christy Dignam's daughter Kiera.
It's hoped that Christy Dignam himself, currently undergoing chemotherapy for cancer, will be able to join his many friends on-stage.