[1] Park was born in Chicago; prior to entering Superstar K2, he was a student at Northwestern University majoring in economics.

[4] He is a fan of Stevie Wonder, John Legend, Gavin DeGraw, Marc Broussard, and Jamie Cullum.

[5] On April 8, 2022, it was confirmed that John will marry his non-celebrity girlfriend with an event on June 12, 2022.

[7] Park auditioned in Chicago for the ninth season of American Idol with "I Love You More Than You'll Ever Know" by Blood, Sweat and Tears.

After American Idol, Park entered the second season of the Korean talent show Superstar K2, where he finished second.