This things usually happens, exist thousands of songs, is possible that some songs sounds similar. I had a rock group some years ago, we made a lot of songs, a couple years ago i found a song of Billy Corgan that have the same tune that one of our songs, and he made the song after we composed our song, but it's impossible that Billy Corgan heard our song, is a simple coincidence.
Anyway, it sounds really similar, not only the main tune...
