Prima J is an American musical duo, composed of cousins Jessica and Janelle Martinez.
They made their debut in 2007 with the single "Rock Star" for the Bratz Motion Picture Soundtrack.
They were discovered by former talent manager Bruce Johnson, who, along with his business partner Jorge Hernandez, introduced the cousins to songwriter Stefanie Ridel.
Prima J made a brief appearance in Bratz, auditioning for the school talent show.
Prior to "Rock Star", they performed the song "Gotta Lotta" for the Disney Channel original movie Jump In!, which was released on the film's soundtrack.