Prima J is an American musical group, composed of cousins Janelle Martinez and Jessica Martinez. Jessica, born on May 25, 1988, and Janelle, born on August 26, 1988, came up with the name "Prima J" by taking the letter "j" out of their first names, and "prima" (meaning female cousins), and put it together. Their self-titled debut album was released on June 17, 2008. They made their debut in 2007 with the single "Rock Star" for the Bratz Motion Picture Soundtrack. They were discovered by former Wild Orchid member Stefanie Ridel. Prima J also makes a brief appearance in Bratz, auditioning for the school talent show, and three of the stars of Bratz, Logan Browning, Janel Parrish, and Nathalia Ramos, appear in the "Rock Star" music video.
Prior to "Rockstar", they performed the song "Gotta Lotta" for the Disney Channel original movie, Jump In!, which was released on the film's soundtrack, and they also starred in Baby Bash's music video "What Is It". They recently made a cameo in the direct-to-dvd film Bring It On: Fight to the Finish the fifth installment of the Bring It On series.