The musician, who was born Sam Bartle before changing his name, has attracted attention for the unusual electronic instruments he creates.
This has included combining the sound of organ pipes with dozens of Furby toys, and old handheld Game Boy consoles.
Early on in his career, he performed across Cambridgeshire as a solo act and as part of bands Yellow Snow and Zibra, putting him on the radar of BBC Introducing.
Jodie said her brother had “always been destined for something”, but admitted she was not expecting it to be Eurovision.
He will perform his electro-pop anthem Eins, Zwei, Drei just weeks after becoming a father to son Max.
“He’s got a five-week-old baby at the moment that in the future is going to be able to say ‘my dad’s done Eurovision’, which is absolutely epic,” Jodie added.