John and Edward Grimes, who have just returned from the MuchMusic Video Awards in Canada, matched their red jeans to jackets bearing the logo of the Los Angeles Dodgers baseball team as they rolled up to practice for tonight's Christy Dignam benefit concert.
Christy is the lead singer of Irish rock band Asian, and tonight's 'A Night For Christy' will raise money for his medical bills following a cancer diagnosis.
"John and Edward approached the committee organising the Christy show and asked if they could help and we agreed," said Billy McGuinness, Asian's guitarist, in an interview with the Irish Herald.
"We're grateful to have them on the bill."
We imagine plenty of Jedward's 'super fans' will be in the audience tonight: two women recently appeared on ITV's This Morning to talk about how they've spent around £50,000 between them travelling the world to support the twins.
Mum-of-two Julie Atkin said: "Going on tour to see them is like a holiday. We don't drink or anything like that - it's what we spend out money on. I wouldn't describe it as an obsession, it's a hobby. We just love doing it."
Others performing at the concert, to be held at the Olympia in Dublin, include Westlife's Mark Feehily. U2 will also perform live from New York.