Two members of K-pop boy group GOT7 congratulated Nichkhun, a member of another boy group 2PM, on his birthday Wednesday.GOT7 members BamBam and Junior shared a photo with Nichkhun, who turned 27.“Happy birthday to my Thai brother, Nichkhun. Thanks for taking care of us since our trainee days,” said BamBam on his official Twitter.BamBam, like Nichkhun, is Thai. Both boy groups GOT7 and 2PM are signed onto JYP Entertainment.2PM is scheduled to hold its “2015 2PM Concert House Party” concert in Seoul this weekend to promote its latest EP “No. 5.”By Yoon Sarah ()