Random question About My IQ?

Hello everyone of yahoo answers... as youve read in the headline i recently tried an experiment in which i see how music affects my brain and i've recently went to the international high iq society and took one of the test while listening to music and i usually score around 130-144 and when I take a test without music i score around 122-127 anyone have a suggestion on why that might be... I mean it's not like i'm listening to mozart or beethoven I listen to John Mayer, Foo Fighters, Everclear, Gorillaz, etc when I take the tests so if anyone could give me an input on how my iq raises when listening to music opposed to not while taking the tests because i'm at a bit of a standstill when calling myself a genius and the validity of the statement so if you could help me please that would be greatly appreciated...