17-year-old Becky won over the 'Domino' hitmaker on Saturday's final blind audition show, and will be seen battling it out for a place on the live shows this Saturday.
Jessie has previously admitted to being harsh with her artists, even making them cry, and Becky reveals that she wasn't lying!
"She doesn’t mess around," Becky said of her mentor. "She makes you work hard which is what I wanted. She is supportive and lovely and down to earth.”
Becky will be battling female duo Indie and Pixie this Saturday night, with one of the acts getting a spot in the live shows and one going home.
Even if she fails to make it, Becky insisted to The Shuttle: "The attitude I have had throughout the show is try my best.
"That’s all I can do. I’m doing something I am so passionate about, I love singing, I love being on stage. I’m determined to do it.”
The Voice UK airs on Saturday on BBC One at 7PM and Sunday at 7:30PM.