'Monster rookie' Lee Hi and 'world star' Psy are battling each other for the number 1 spot on MBC "Music Core."

On April 20, Lee Hi will be making her first performance on MBC "Music Core." She was the runner up of the SBS program, "K-Pop Star." On other music programs, Lee Hi took over the charts with her new songs, "Rose" and "It's Over."

In the same agency is Psy. MBC has taken down their ranking system and many are curious to see who will take the number 1 spot.

Lee Hi plans to perform her newest song, "Rose" on the show.

Their agency stated that they are not sure whether or not Psy will be appearing on the show due to his busy schedule.