Natalie and Nicole Albino (born in New York City) are identical twin sisters who sing under the name "Nina Sky". They are half-Puerto Rican and half-Dominican.

Their parents moved from Puerto Rico and were divorced when the girls were very young. The twins' mother remarried with a DJ, who also happened to be Puerto Rican. They grew up in the Queens and Roosevelt Island sections of New York.

Since their stepfather worked as a DJ, the twins were influenced by different types of music.