Mnet 20's choice question?

as stated in allkpop, there will be live streaming for this awards in 7th july (if i'm not mistaken). and looking at the candidates for every award, i only find one categorie for SNSD and there's none for TVXQ even they are top. i know SM problem with MNET but f(x) have been nominated in many categories. is it may be SNSD didn't yet release any korean album this year? and if possible, may i know which group will perform? just want to see if my time worth to wait for 3 hours:)