The boys of WINNER created a funny parody of hit drama 'Heirs' for this week's episode of 'WINNER TV.'  While Kang Seung Yoon took on Kim Tan, Nam Tae Hyun became a pretty Eun Sang, Song Min Ho transformed into the charismatic Young Do, Kim Jin Woo became the catty Rachel, and Lee Seung Hoon played, well, everything else.  

SEE ALSO: Actress Kim So Eun writes heartfelt message after death of former 'We Got Married' co-star Song Jae Rim

There is even a cameo by Big Bang's Seungri, who plays the role of Yang Hyun Suk attempting to send Eun Sang away to another agency like JYP and Antenna Music.  

In addition, the members threw a surprise birthday party for Kang Seung Yoon after they filmed the pool scene for the parody.  Although they did not have time to buy presents, they managed to get a beautiful cake that was lit up while they sang happy birthday to the brightly smiling Kang Seung Yoon.  He had turned 20 years old (21 in Korea) on January 21!

Check out the video above!  The parody starts at 7:07 with the character introductions.