On April 14 airing of MBC FM4U 'Kim Shin Young's Noon Song of Hope', former 'Kpop Star 3' contestant Sam Kim revealed that he had lost a total of 25kg (approximately 55 lbs) during the span of 3 years! 

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When asked about his consistent weight loss, Sam Kim relayed, "Right now, I've gained a little back again. But for the past 3 years, I lost weight by eating healthy and working out often." 

He also added, "I also practiced my guitar a lot, and studied song-writing and Korean." 

All you need to do is eat healthy and work out, folks!