SISTAR, recently nicknamed the "athletic-idols" due to their outstanding performance on MBC's "Idol Star Athletics Championships," have recently finished their photoshoot for snowboarding clothing brand S.T.L.'s 2010 F/W line. According to a related source, the girls were energetic throughout the shoot and brought a lively attitude to the photos with their charismatic posing. Meanwhile, other artists joined the girls of SISTAR as models for S.T.L, including Mighty Mouth, Joo Suk, and JJ. [gallery] Source + Photo: Nate