Riddle of the Day

So todays riddle is about someone that is actually considerably special to me. The group is B******** and the member is........
......... considered the Korean Jay Chou (if you don't who Jay is, he is a Taiwanese singer).
He was born in 1989.
He is the funniest member in the group. As well as the troublemaker (due to his budding curiosity).
He is very forgetful.
He is like the parent of the group by scolding and giving advice.

Do you know who it is?.....