Adam Ostrowski (, born 15 May 1980 in Łódź, Poland), 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. Having graduated music school playing the violin, O.S.T.R. is one of the few Polish rappers who has a musical education.
He collaborated with rappers such as Evidence, El Da Sensei, Craig G, Keith Murray, and Sadat X.
He featured in the Heineken Open'er Festival in Gdynia, Poland. He performed on the main stage doing his own two-hour set, and then appeared again the next day with Bloc Party to do a one-off duet.
Read more about O.S.T.R.: Videoclips, Movies