Korean mask singer, also known as Talchum, is a traditional Korean performance art that involves singing, dancing, and acting while wearing a mask. The masks are often brightly colored and represent different characters, such as a shaman, a nobleman, or a clown. The music is accompanied by traditional Korean instruments, such as the janggu and the buk, and the performances are often humorous and entertaining. It's a genre that celebrates Korea's rich cultural heritage and is still popular today.