J.Y. Park was astonished by Jessi's incredible improvements on the June 10 airing of 'Unnie's Slamdunk'!

Last week, J.Y. Park targeted Jessi with harsh criticism for her lack of effort. However, on this week's episode, Jessi shocked J.Y. Park with her improved vocals, getting showered with compliments! The producer stated, "Everything sounds dope. You sound like Mary J. Blige." 

SEE ALSO: J.Y. Park lashes Jessi with harsh criticism on 'Unnies' Slam Dunk'

He continued his great compliments throughout her recording, and even said, "Perfect! She really sounds black."