Singer Lee Hi has made her official comeback on Mnet "M! Countdown" today.

Today, Lee Hi made her comeback on Mnet with her new song, "It's Over."

She wore a short blue one piece with a hairband for a cute image. Her explosive performance showed off  her amazing talent and vocals.

With the jazz and rhythm and blues vibe of the song, it looked almost like a musical performance.

It is rare to see a 16 year old with that much soul and emotion, making her a true 'monster rookie'.