2AM's�Jo Kwon�continues to tease fans leading up to his comeback.

On December 28, the idol singer posted new content on Instagram hinting at his next collab.

A teaser video featured shiny red boots as Jo Kwon played on the keyboard. �The caption read,�"Surprise event '?' collaboration??"�in addition to date marked for December 29.

SEE ALSO: Jo Kwon opens up about how he was willing to leave his celebrity life behind for his first love on 'Strong Heart VS'

A black and white photo was also revealed of the star in the dance studio, adding to the hype.

Can you guess which star he'll be collaborating with?

surprise event