Jessica - who made the final 10 in Pop Idol - is singing the UK entry in the yearly popfest, and is hoping advice from the Pop Idol winner will help her taste success in Estonia.
Loads of top acts have found fame after appearing at Eurovision, including Abba, Celine
Dion and Enrique's Iglesias' dad Julio.
Big night party
She added that her mum is planning a huge Eurovision party for people to watch and desperately trying to get the garden ready for Jessica's big night.
The Eurovision Song Contest is being held in Estonia beacause they won the competition last year.