K-pop in general. My interest started waning in 2013 (this coincided with the abrupt oust of T-ara's reign and the embarrassment that was T-ara N4), got back into Western pop music via Lana, Kylie and Sky (incidentally I also became a huge Ayu stan), but the final nail in the coffin was when I switched to Spotify full time -- with it's limited K-pop selection.
My Twitter is still 50% K-pop stans so I get the gist of what's new and happening, but I hardly ever listen to it these days. Lovelyz are my favorite of the recent debuts though.