Their parents moved to New York from Puerto Rico and were divorced when the girls were younger. They were born in Queens and grew up in both Queens and Roosevelt Island sections of New York. Because their stepfather worked as a DJ, the twins were infl

Their parents moved to New York from Puerto Rico and were divorced when the girls were younger. They were born in Queens and grew up in both Queens and Roosevelt Island sections of New York.

Because their stepfather worked as a DJ, the twins were influenced by different types of music. When the sisters were only 7 years old, they wrote their first song, "Sisters", and by the time they were 10, they already knew that they wanted to become singers.

The twins' parents were very supportive of their daughters' ambitions. Their stepfather even gave them guitar and drum lessons. They were taken to auditions and, on some occasions, they even performed on some showcases. The sisters wanted to devise a name of their own. In using the first two syllables of their names ("Ni" and "Na"), they came up with Nina. They then added Sky, which for them represented "the sky's the limit".

They continued to go to school and, in their spare time, worked as DJs. In the year 2000, they met