Asthmatic T Rex has 4 Petter concerts.

1) Petter (real name Petter Alexis Askergren, born 1974) was not the first Swedish MC. Neither was he the one that made Swedish an accepted language on the domestic hip-hop scene, that honor goes to the Latin Kings. But Petter was the first Swedish hip-hop artist breaking through to a mass audience, making the genre marketable and, by that, making way for a great number of younger MCs. Growing up in Södermalm, Stockholm, he was a member of the bands Vanguards and Blacktop Dandelions, still rapping in English.