Superstar K2 contestant Kim Greem began her solo promotions with her debut stage on M! Countdown tonight. Back then, she went by her real name, Kim Geu Rim, but to kick-start this new phase in her life, she decided to take on a stage name to break out from the "Superstar K2" cocoon. Her debut track, "Nobody But You", is very reminiscent of the folk-rock style from the late '80s to the early '90s. Kim Greem's sweet, yet earthy voice adds a modern touch, while the buzzing harmonica and simple acoustic chords pay homage to the old-school style. The song sings of a lover's regret after she realizes that her ex was "the one" all along. She confesses that at the time, she didn't realize what love really was - that she was ungrateful and unappreciative of what she had. It took her a long time to understand, but now, with regret weighing heavily in her voice, she says that she loves him, and that he is her only love. Unfortunately, Kim Greem was rushed to the ER on April 5th, two days before her debut. Her agency Nextar Entertainment revealed, "She experienced immense pain on the night of the 5th, and once we rushed her to the ER, she was diagnosed with a stomach ulcer. We feel that it's because of the pressure she's been under while preparing for her debut. She was discharged immediately, and we feel that it won't be affecting her debut." Check out her debut stage below! Source: BNT News via Nate