The kiss happened during a live Instagram broadcast. It looks like the best friends got together to celebrate Sulli's birthday, which is March 29.
In the clip, Sulli and Hara are captured wearing matching dresses, giggling and having a good time. They also surprise the viewers as they suddenly lock lips! The two idols have been stirring up many controversies with their questionable Instagram posts.
SEE ALSO: Sulli gets bold for the cover of 'Elle'
What do you think of their kiss?
[Thanks to everyone who sent this in.]