According to Björn Again's website "Agnetha Falstart, Frida Longstokin, Benny Anderwear and Björn Volvo-us surfaced in 1989 after their helicopter and a giant glittery platform shoe from outer space collided leaving them stranded on a deserted island."
So Radio Sheffield's Bernie Clifton coaxed them into his studio for a quick chat.
Since crashing from space, the foursome talk about how they travel around in their glittery platform shoe.
Hear Agnetha talk about how a linguistics expert analysed their accents and concluded that they spoke "Swinglish" - a mixture between Swedish and English.
Björn confides that his name in Swedish means "god of rock" and so he finds being a rock god easy to cope with, even though he's having a bad hair day.
And all four laugh at how they thought they were playing their gig in the "Octopus"!
Click on the links at the top right hand side of this page to listen!
Listen to Bernie Clifton's show on weekdays 1-4pm on 104.1, 88.6 & 94.7FM, 1035AM and also DAB digital radio.