Listen to Prima J on Batanga

Prima J, also known as Chilosas, is an American pop musical duo, that is composed of Spanish cousins Janelle Martinez and Jessica Martinez. They made their debut in 2007 with the single "Rockstar" for the Bratz Motion Picture Soundtrack. They were discovered by former Wild Orchid member Stefanie Ridel. They have recently completed the recording of their debut album, which was released on June 17, 2008. Prima J also makes a brief appearance in Bratz, auditioning for the high school talent show, and three of the stars of Bratz, Logan Browning, Janel Parrish, and Nathalia Ramos, appear in the Rockstar music video. In the Bratz, they also sang the brief lyrics of "Take It To The Maximum", "It's My Party", and "Kick It" during their audition for the school talent show. The group's name comes from the fact they are cousins (prima is the female version of the Spanish word for cousin) whose names begin with the letter J. They have a new song called "Corazón (You're Not Alone)".

Prior to "Rockstar", they performed the song "Gotta Love" for the Disney Channel original movie, Jump In!, which was released on the film's soundtrack. The single "Rockstar" was also featured in the Gossip Girl episode, "Dare Devil".

They recently made a cover of Alicia Keys' song "No One" and translated half of the lyrics into Spanish, and turned the title into "Nadie". The band was featured on the cover in the June and July 2008 issue of Latina magazine. Prima J is the opening act for Jordin Sparksand Jesse McCartney in their month-long co-headlining tour. On August 9th, 2008, they performed in front of over 10,000 people at the WWE Summerfest in Venice Beach, California. and they also performed on September 15th, 2008, during the Philadelphia Eagles at the Dallas Cowboys game on Monday night at the NFL halftime show.