Ryszard "Peja" Andrzejewski is a Polish rap musician, songwriter and producer. He is best known as the frontman of the Polish rap group Slums Attack. Peja was the recipient of the Fryderyk prize in 2002. In 2001 he played a role in the documentary movie "Blokersi". He has been featured in The New York Times and The Source. The Slums Attack broke up in 2016.
Peja has collaborated with such artists as Onyx, Jeru the Damaja, Masta Ace, AZ, Ice-T and Sweet Noise.