Can somebody help me with the song of this video? The song says "hello hello oh oh..... I don't believe....." I've listened a lot the song but I don't know who are the singers. Can you help me please? Thank you 
http://www.youtube.com/watch?v=9bsOymPE-DY

http://www.youtube.com/watch?v=9bsOymPE-DY