J Marie previously performed on Strictly Come Dancing, performing the same track to accompany Holly Valance's Foxtrot.
But this time she was performing for some of the biggest names in the music industry, including US star Will.i.am and legend Sir Tom Jones.
And, of course, Jessie J.
Speaking about the experience, [tag]J Marie Cooper[/tag] described as "the most nerve wracking thing" she's ever done.
She explained: "It's strange 'cause when you're normally singing, you get an instant reaction, but you don't with [the coaches]. You want to know what they're thinking."
The Voice UK will start on BBC one tomorrow night, with J Marie amongst the wannabes hoping to get the coaches to turn around.
Watch J Marie performing Mamma Knows Best on Strictly Come Dancing last year below...