Girl groups f(x) and SISTAR as well as ZE:A's�Dongjun and Kwanghee were sighted at Incheon International Airport on August 23rd as they departed for Hong Kong for a K-pop concert. Besides the two girl groups, KARA and miss A also performed at the "K-POP Girls in Love LIVE in HK 2011" at the AsiaWorld-Arena this evening. Meanwhile, 2AM, CNLBUE, F.T. Island and ZE:A will perform at the "K-POP Boys in Power LIVE in HK 2011" which will be held on the 24th at the same venue. Both concerts were hosted by Dongjun and Kwanghee. Check out some of the airport fashion on show below! [gallery] Photos: Issue Daily