Jung Joon Ha turned into a SISTAR member.

Today, Jung Joon Ha posted on his Twitter, "We SISTAR is actually 5 members" along with a picture taken with SISTAR members.

In the revealed picture, Jung Joon Ha is standing with SISTAR members in the same exact outfit, hairstyle, and pose. His seductive facial expression with the short dress aroused laughter.

Internet users who saw this commented, "Jung Joon Ha is SISTAR's hidden 5th member?," "Yesterday's episode was so funny," and "Sexy girl."

Photo Credit: Jung Joon Ha Twitter