In ' FAN N STAR ', the female duo BOL 4 Woo Ji-yoon's birthday advertising project.

Where fans and stars become one, FAN N STAR, held a surprise event for Woo Ji-yoon on December 13. It is a huge advertising project to celebrate her birthday on January 6.

Woo Ji-yoon's birthday project is a support type event for both domestic and foreign fans. The number of stars contributing to the project (points that can be collected at the site) determines their success.

If 20,000 stars or more are gathered, congratulations will be shown on the CM board at Hapjeong Station in Mapo-gu, Seoul. If it reaches 65,000 stars, there will also be advertisements on electronic panels in the waiting rooms of 43 stations in Seoul Subway Line No. 2. In addition, there are plenty of other products such as travel bus, airport train AM board, multipluvision at Hongdae Station, and CGV trailer commercials in Hongdae.

Previously, ' FAN N STAR ' opened Woo Ji-yoon's birthday support on December 7 last year. With the participation of many fans, 121,731 stars were gathered. From January 1 to 7, 2019, congratulatory video was shown on the electronic board near Shinokubo Station in Shinjuku, Japan.

It is expected that Woo will be able to receive a surprise gift from his fans this year. The event runs through December 29 and can take part in the 'ADs.' section of the 'FAN N STAR' homepage.