John and Edward Grimes burst on to the scene in 2009 as a phenomenon on X-Factor, and have been a mainstay on the showbiz scene ever since.
TV, movies, Eurovision: no one can escape this Irish duo's j-epic brand of entertainment.
But what impact has more than 15 years of fame had on the boys as they became men?
Their care-free, feel-good attitude is synonymous with the Jedward brand, but losing their mum at an early age, and playing the fame-game has had its own impact behind the scenes.
Now 33, they've given Katherine Ryan a few drops of their blood to get it tested, so she can find out their biological age.
As twins, their DNA is an exact match, so our resident scientist Dr Nichola Conlon explains how slight variations in diet and mindset could be a reason why their biological ages might differ...
And will the boys get competitive when the results are incoming? You bet!
Lead producer– Mick Coyle
Social media - Cassidy Rebelo
Video Producer – Elena Cotton
Video Producer– David May
Artwork – Ben Watkins
Video Editor - Paul Collins-Reddin
Head of Video – Edie Jefferys
Sound Designer – Dominic Delargy
Executive Producer – Henrietta Harrison
Chief CreatIve Officer – Lucie Cave
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