Jessica, 20, sung her heart out live on the Song for Europe show on BBC1 with the romantic ballad Come Back, which is produced by the team behind Atomic Kitten.
The public decides
She beat off the competition with her shiny microphone, winning 67,798 of the votes in just 10 minutes.
She was up against finalists Tricia Penrose, Jonathan Maitland and boy band Level Best.
All of them gave live performances of their song while viewers voted for their favourite throughout the show.
In second place was Tricia from TV show Heartbeat with 28,621 votes whilst Level Best came in last with 8,927 votes.
Jessica now goes on to perform Come Back in The Eurovision Song Contest 2002 on 25 May.