Vivian Hsu (Atayal: Bidai Syulan;[1] Chinese: 徐若瑄; born March 19, 1975) is a Taiwanese actress, model, and singer.

Hsu's career started after winning first place in a "Talented Beautiful Girl" contest held by Taiwan's CTS in 1990.

At that point, she was working by delivering food on her bicycle, and her customers began to recognise her from her television appearances.

She played the role of Chao Jiale in Love Storm (2003), alongside Vic Chou and Ken Chu.

Since 2010 she has appeared in television commercials for the aesthetic salon Slim Beauty House, and Kao's Essential hair care brand line as one of its three newfaces along with Yuriko Yoshitaka and Nozomi Sasaki.

In 1997, with two Japanese comedians—Kyoya Nanami and Amazan—and later with a second female vocalist known as Keddy, she joined the musical act Black Biscuits.

Towards the end of the group's run, they failed to accomplish one of the challenges set forth by the variety show and the resulting punishment was the disbanding of Black Biscuits.

During this period, Hsu also released two more solo albums: Da Mafan (大麻煩) in 1998, and Bubai de Lianren (不敗の戀人) in 1999.

Over the next two years, she released a few more singles, including, alongside Kazuma Endo of Siam Shade, Moment, the second opening theme to Mobile Suit Gundam SEED, followed in 2003 by her next solo album, The Secret to Happiness Is Love.

For this album, Hsu collaborated with many artists and people including Jay Chou, Wang Leehom, Gary Cao, Nicky Lee and even her little brother and uncle.

Hsu returned to Japan after a seven-year absence to release her new single Beautiful Day on March 3, 2010.

In January 2014, Hsu got engaged to Singaporean businessman Sean Lee of Marco Polo Marine Limited.