Prima J

All Music Guide:

Pop duo Prima J feature the singing and dancing talents of cousins Jessica and Janelle Martinez. Raised in Rosemead, CA, the pair were encouraged to perform for their families from a young age, a passion they carried into their teens. Introduced to former Wild Orchid member Stefanie Ridel by singer Nikki Flores, Ridel mentored the duo and helped develop their dance-pop sound and live act. After Prima J were signed to Geffen Records, their debut single, "Rockstar," was featured on the Bratz motion picture soundtrack in 2007. The duo's full-length eponymous debut followed in 2008.

Wikipedia:

Prima J is an American musical group, composed of cousins Jessica and Janelle Martinez. Jessica, born on May 25, 1988, and Janelle, born on August 26, 1988, came up with the stagename "Prima J" by taking the letter "J" out of their first names, and the spanish word "prima" (meaning female cousins), and put it together.

Their self-titled debut album was released on June 27, 2008. They made their debut in 2007 with the single "Rock Star" for the Bratz Motion Picture Soundtrack. The single "Rock Star" has over 20 million viewers on Youtube. 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.