Sandy Leah Lima (born January 28, 1983) known mononymously as Sandy, is a Brazilian singer-songwriter and actress. Born and raised in Campinas, she began her career in 1990, when she formed with her brother, musician Junior Lima, the vocal duo Sandy e 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 was credited for 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.