SISTAR and CNBLUE made appearances on the January 15th broadcast of MBC's "A Concert for the Beautiful (ICON)" and displayed their powerful vocals through various covers of their seniors' songs. SISTAR performed a duet with the legendary Park Sang Min and sang one of his hit tracks, "Blue Jeans Girl," which immediately impressed the audience.  As it was his first stage with a girl group, Park Sang Min was surprised over how well they pulled off the live performance.  He commented, "I never knew that SISTAR was a girl group with such great vocal talents.  Hyorin's husky voice is so charming." Despite having other schedules to tend to, the girls practiced day and night for their performances. CNBLUE's Jonghyun and Yonghwa also stunned the crowd with their charming acoustic performances of Jason Mraz's "Geek in the Pink", as well as their own track, "Love Light". Check out their performances below! == < SISTAR's cover of Big Mama's "Refusal" > < SISTAR & Park Sang Min's "Blue Jeans Girl" > < CNBLUE's cover of Jason Mraz's "Geek in the Pink" > < CNBLUE's "Love Light" > Source + Photos: Newsen via Daum