1. Popular idol group member C is undeniably the hottest star of the music industry. Netizens have noticed something suspicious going on between C and popular girl group member D, but recent rumors say that he also might be developing feelings for another popular idol group member E. C and D were a trending topic online after accounts of people spotting them at a famous club together in Seoul at the end of the year last night began making its round online. Recently, however, the direction of the rumors have changed, as netizens now suspect C to have something going on with E. C and E are both known for not following other celebrities on SNS, but not only do they follow each other, C also likes every single one of E's pictures (TN: the SNS mentioned here is Instagram, the topic has come up often on community boards of C liking a bunch of E's pictures in a row). While one side argues that C also follows plenty of other celebrities and likes plenty of other pictures, one industry insider said, "We don't know for sure if C ever dated D or is dating E but I guess this just proves what an amazing star he is considering all of the rumors he gets into with popular female stars."

C = G-Dragon
D = Lizzy
E = Krystal

Source

The other one was a Shin Hye / Yonghwa rumour but they're pretty obvious already

Well, that was UNEXPECTED