Fan & Star, a website that delivers idol ranking information, is holding a birthday ad support for Sihyun of the group We The Zone.

Fan & Star opened a surprise event for Sihyun on Thursday. It is a large-scale advertising project to celebrate his birthday on April 6.

Sihyun's birthday event will be a success with the number of stars donated by fans (points collected on the site). The more stars gather, the more celebratory advertisements are posted in various places.

Once 20,000 stars are gathered, a congratulatory video will be shown on the CM board at Hapjeong Station in Mapo-gu, Seoul. If the number of stars reaches 45,000, a congratulatory video will also be sent to the SM board (wall) at Gangnam Station. In addition, a variety of products are available, including electronic boards of waiting rooms at 42 stations on Subway Line 2, large electronic boards at the intersection of Hongdae Station, and Myeong-dong Media facade.

The event will run through the 26th and will be available at the "ADs" section on the Fan & Star website.

Meanwhile, Sihyun made her face known by appearing on Mnet's "Produce 101 Season 2." It debuted on May 27 last year with the four-member boy band "We the Zone".