Sweety is a Mandopop band from Taiwan, a duo consisting of Esther Liu (; colloquially known as 言言 Yan Yan) (born August 8, 1988) and Joanne Tseng (sometimes transliterated as Joanne Zeng or Joanne Zheng; ; colloquially known as 喬喬 Qiao Qiao) (born November 17, 1988). The duo were formed in 2002 and debuted in 2003 when both members were only 14 years old.