Any girl can be a rock star with this Barbie Voice Changing Rock Star Boombox! This boombox features big sound and a sing-a-long microphone that will have girls strutting their stuff like superstars. Girls can sing along to the built-in music and add echo, or change their voice to sound deep, high-pitched like a chipmunk, or even like a robot! Connect an MP3 Player and girls can perform anything from their own playlist.