Born Agatha Kong on January 21, 1988 in Hong Kong, and known professionally as AGA, the Cantopop and R&B singer-songwriter kicked off her career in 2013 with debut single "Hello." After being discovered by revered Hong Kong producer Schuman, the former flight attendant was enlisted to produce demos for other artists, writing "The Fifth Kind" 第五類 for Stephanie Cheng, and in 2012 moved into the spotlight to sign with Universal Music Hong Kong as a singer. Kong made an impact with her R&B-centered eponymous debut EP in 2013, scooping the Best Newcomer Award Gold Prize (叱吒樂壇生力軍) at the 2013 Ultimate Song Chart Awards. Continuing her winning streak with the ONE EP in 2014, she shot to the top of all four major music charts in Hong Kong and secured her place as one pop music's most exciting new voices. In 2015, Kong released the single "If" 若 to commemorate the death of her sister who died as a result of cancer in 2015. Her gold-selling second album, Ginadoll, was released in 2016 and her third album, Luna, in 2018. 2020 saw the release of So Called Love Songs. In 2021, AGA became the first Universal Music female artist to top TVB charts after HKRIA and TVB resumed collaboration, with her hit "CityPop" winning a Gold Song Award. She later mentored on Stars Academy. Her song "Tomorrow" became her first five-chart-topping single. In 2023, she released "MIZU", held her debut Coliseum concert AGA ONEDERFUL LIVE, and signed with Warner Chappell. In 2024, she released the all-original album Agatha. Her final album under Universal Writer's Block was released in August 2025, featuring songs like "Drunk Dial" and "You don’t have to be so strong all the time".
