During the Superweek, his low husky voice, appearance, and unpredictable character trait appealed to the viewers as well as the judges, especially one of the judges, PSY. Moreover, his collaboration with Roy Kim covering "먼지가 되어 (Becoming Dust)" by (Kim Kwang-Suk), which Jung changed the ballad to the rock version, became a big hit and the best duet audition song ever. After releasing, it achieved an "all-kill" on real-time charts and won the Mnet 20's Choice Hot Cover as well as 2013's Most Popular Karaoke Song of the Year at the 3rd Gaon Chart K-Pop Awards. Jung was at risk of dropping out several times, though he passed through into the finals by Psy's choice in the judge's final decision.