On the January 24 airing of MBC's 'Radio Star', Jackson mentioned fellow foreign idol Henry and said, "Henry and my Korean skills often get compared." He added, "Hyung is way better than me. He was in Korea for 9 years while I was here for 6 years. But I'll be much than him 3 years from now."

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Jackson also brought laughter as he said, "On a different show, Henry hyung criticized my English skills. So I'm going to diss Henry hyung on here too."