SHINee's Key has shocked fans by suddenly shaving his head.

On March 16, Key posted a video on Instagram below along with the message, "Guess what's going on?" In the clip, the SHINee member takes an electric shaver to his own head and seems a bit surprised by the whole thing himself.

Some fans are suspecting Key might be preparing to enlist for his mandatory military service, while others are hoping for a SHINee comeback.

Stay tuned for updates! What are your guesses on what Key could be up to?