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.