X Plastaz is a Tanzanian hip hop musical group based in Arusha and founded in 1996. They are one of the most popular acts in the Tanzanian hip hop scene. Their style mixes elements from international hip hop and traditional Maasai music, represented by Maasai singer Merege. While Merege sings in maa (Maasai language), the other members of the group rap in swahili and haya. Merege is also well known to perform in traditional Maasai clothings.
X Plastaz hip hop is slower paced that most African hip hop and strongly characterised by Maasai deep chanting. X Plastaz songs such as Aha!, Dunia dudumizi, Bamiza and, most notably, Msimu kwa msimu are among the most popular hits in the bongo flava genre.