Sandy Leah Lima, known mononymously as Sandy, is a Brazilian singer-songwriter and actress. Born and raised in Campinas, Sandy began her career in 1989, when she formed with her brother, musician Junior Lima, the vocal duo Sandy & Junior. They rose to fame in the early 1990s as child stars and reached the height of their success during teenage, as albums Era Uma Vez... Ao Vivo (1998), As Quatro Estações (1999), Quatro Estações: O Show (2000) and Sandy & Junior (2001) sold more than a million units, with the second and third being among the best-selling albums of all time in Brazil. The duo were credited with leading a wave of teen pop artists during the late 1990s and early 2000s, with the press labelling Sandy the Brazilian "Princess of Pop". The duo disbanded in 2007 and released their Acústico MTV in September that year. In addition to their success in the music industry, the sibling's name became a strong brand, with more than 300 licensed products which made R$300 million a year.

Sandy & Junior were a Brazilian pop music duo consisting of siblings Sandy Leah Lima and Durval de Lima Júnior. They first gained notoriety by being the children of Xororó from popular sertanejo duo Chitãozinho & Xororó. Sandy & Junior began by singing children's songs and sertanejo-influenced tracks. Once they reached adolescence, they changed their style to pop-influenced songs, mainly ballads and upbeat songs. They became a pop phenomenon in Brazil with the release of the albums Era Uma Vez... Ao Vivo (1998), As Quatro Estações (1999), Quatro Estações: O Show (2000) and Sandy & Junior (2001), which sold more than 9 million copies together, receiving multiple diamond certificates. Época magazine compared their success to Beatlemania. One of the best-selling Brazilian artists of all time, Sandy & Junior sold over 15 million albums.