The 27-year-old singer beat off stiff competition from bookies' favourite Leah McFall and fellow finalist Mike Ward on Saturday night (22.06.13) to come first place in the BBC One competition and secure a recording contract.
Following her victory, Andrea, who wowed viewers with her three performances of Evanescence's 'My Immortal', 'Angel' by Sarah McLachlan and 'Hall of Fame', accompanied by her mentor Danny O'Donoghue and his band The Script, said: "I actually can't speak. I never ever, ever could have imagined this."
The Northern Irish singer also told host Holly Willoughby: "Honestly, first and foremost I have to thank everyone at home for voting for me. Hopefully I will try my best to put your vote to good use and be a success. Thank you so much."
Irish rocker Danny hailed Andrea's victory and called her an "inspiration".
Andrea also earned high praise from the other mentors, Jessie J, Tom Jones and Will.i.am during the final.
The Black Eyed Peas rapper admitted: "Andrea came with her best, everything was in key, controlled and magnificent."
Leah was widely tipped to win this year's reality series after her version of Gloria Gaynor's hit 'I Will Survive' stormed the charts.
Matt Henry was the first contestant to be voted off the show during the final.
Supplied by Bang Showbiz
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