O.S.T.R Adam Ostrowski – Polish hip-hop hero, musician, record producer, instumentalist and rapper. He graduated from the Academy of Music in Łódź, violin class. One of the most industrious and talented artists in Poland. He has achieve almost everything on Polish hip-hop scene. Author of 20 music albums. He got 6 gold, 7 platinum (one dubbel and one tripel platinum) album awards. For over a dozen years he is on non-stop tour . On 23rd of February 2018 he released new album ‘W drodze po szczescie’ (eng. ‘On the way to happiness’). His previous album “Życie po śmierci” (eng. Life after death) has exceeded more than 100.000 copies, becoming the best selling CD in Poland in 2016. Valued musician abroad, he has collaborated with musicians from US such as Evidence, also from British and Dutch hip-hop scene. With Chris Van Rootselaar and Jaap Wiewel he co-creates collective producers named Killing Skills. O.S.T.R. is now one of the most famous and respected rapper in Poland.