The 21-year-old singer had all four of the panel press their buzzers with her performance of Rolling In The Deep, but chose the Black Eyed Peas star.
Recalling her audition, Joelle said: “I just remember that I couldn’t breathe and all of the coaches turned around ... I’d love to work with all of them!"
"Danny was so sweet... [but] I went with will.i.am because I felt like we can do something."
Will told the young singer after her performance: "You’re going to have a career for a long time and I’d like to work with you as an artist."
Joelle, who previously failed to make it past The X Factor bootcamp stages, added: "I feel like my voice is who I am and when I’m singing that is me, that's what I live for
“I feel like this moment was bottled up inside of me for so long.”