Tanya Chua Chian Ya (born 28 January 1975) is a Singaporean singer-songwriter. She launched her singing career by releasing her debut studio album Bored in 1997. She was part of the trio that sang "Moments of Magic" (1999), Singapore's official millennium song. Her albums, Amphibian (2005), Goodbye & Hello (2007), Sing It Out of Love (2011) and Depart (2021), each won her a Golden Melody Award for Best Mandarin Female Singer award.

A veteran in the industry with a career spanning more than two decades, Chua is the first and only person to win the Best Mandarin Female Singer award four times at the Golden Melody Awards, and has achieved popularity in Greater China and among the Chinese-speaking world.

Chua was born in Singapore on 28 January 1975. She attended CHIJ Saint Nicholas Girls' School, and achieved a diploma in business administration at Singapore Polytechnic in 1996.

In 1997, Chua signed a recording deal with Singaporean management company Music & Movement, and debuted her singing career by releasing an English album titled Bored. In 1998, she attended the electric guitar classes at Musicians Institute in Los Angeles. In 1999, Chua signed a recording deal with PolyGram, and released her first self-titled Mandarin album. In the same year, she released her second English album Luck. The song "The Wicked Signs of Trying to Be a Superstar" was written by Taiwanese singer-songwriter David Tao.

In March 2000, Chua released her second Mandarin album Remember under Universal Music Group which acquired PolyGram on the same year. The album earned her a nomination for Best New Artist at the 11th Golden Melody Awards. In the same year, she wrote the theme song of the Singaporean film Chicken Rice War, and appeared on the film herself. In 2001, Chua released her third Mandarin album I Do Believe which earned her a nomination for Best Mandarin Female Singer at the 13th Golden Melody Awards. In the same year, she performed in the Singapore National Day Parade with her self-written theme song titled "Where I Belong". In 2002, Japanese record label S2S released an English album titled Secret Lavender which contained seven songs from Chua. Her composition "Wrong Number" for Chinese singer Faye Wong earned her a Golden Melody Award nomination for Best Composition.

In 2003, Chua signed a recording deal with Warner Music Taiwan, and released her fourth Mandarin album Stranger which earned her a nomination for Best Mandarin Female Singer at the 15th Golden Melody Awards. In the same year, she released her fourth English album Jupiter. In 2004, Chua produced Hong Kong singer Gigi Leung's album Belongingness. In 2005, Chua released her fifth Mandarin album Amphibian. At the 17th Golden Melody Awards, she won her first Best Mandarin Female Singer award along with other nominations for Best Pop Vocal Album and Best Album Producer. In 2006, Chua moved to Taipei, and launched her own music production company Tangy Music.

In May 2007, Chua signed a recording deal with Taiwanese record label AsiaMuse Entertainment. The following month, she was featured as background vocals in Taiwanese singer Chang Chen-yue's song "Yearning Is a Kind of Sickness". In October of the same year, she released her sixth Mandarin album Goodbye & Hello which earned her two awards for Best Mandarin Female Singer and Best Album Producer out of seven nominations at the 19th Golden Melody Awards.

In 2008, Chua released her live album My Space which was nominated for Best Mandarin Female Singer at the 20th Golden Melody Awards.