Jessie J sings impromptu duet to coax 'The Voice' contestant

Jessie J ended up starring in her own audition when she took to the stage to persuade one of the contenders on 'The Voice' to sign up with her.

The 'Price Tag' singer performed an impromptu duet with Lemuel Knights after rival coach Danny O’Donoghue tried to sign up the 18-year-old.

She told the teenager, who previously appeared on ITV rival 'The X Factor', she had a special “pitch” to persuade him to join her.

She said: “The one thing you will be able to do with me is sing with me, and I would be honoured if we could quickly do a little bit of that together now.”

The pair then shared the stage for a performance of 'Do It Like A Dude'.

[comment]Here's what he sounds like rehearsing at home.[comment]