'Superstar K2' contestant�Jang Jae In became the latest alumni to make her solo debut through today's episode of Mnet's�'M! Countdown'. For those readers who aren't very familiar with Jang Jae In, she's known as a 'Cinderella' amongst fans because she managed to overcome a long and troublesome past in order to pursue her dreams of becoming a singer. Her debut album (which was also released today), was composed, wrote, arranged, and produced her entire debut album. Jang Jae In's appearance on 'M! Countdown!' saw her perform her title track, "Toy Soldiers". Breaking past everyone's expectations of coming out with a folk song, the star�opted for a retro soul track instead which gave her lots of freedom to move and dance around to. The song is also unique in that it's an expression of her criticisms against a standardized society. Check out her debut below!