While fans were celebrating Changmin's 26th birthday (27 in Korea) on Twitter with hashtags, he was celebrating with his fellow TVXQ member Yunho.

The above photo, shared on the duo's official website, shows the two holding a cake and cheering at Changmin's party. Are you also wondering who else was there?

In other news, Mnet's mobile drama starring Changmin and Moon Ga Young, 'Mimi', premieres on February 21.