Adam Ostrowski, better known as O.S.T.R., is one of the most renowned rappers in Poland. Famous for his freestyle rap skills, O.S.T.R. in his works touches on various topics, from joint smoking to current social and political matters. He has been working for the MTV channel, and right now he is finishing his studies. Having graduated music school playing the violin, O.S.T.R. is one of the few Polish rappers who have a basic musical education. Wikipedia
The definitive Wikipedia entry for O.S.T.R.. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/O.S.T.R.
The definitive Wikipedia entry for O.S.T.R.. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/O%2eS%2eT%2eR%2e