Wierd dreams and music

Weird dream i had last night i do not remember most of it but part of what i do remember was being on a bus and this certain song coming on.this morning when i was on the bus i had my ipod on shuffle and i came on the very same song just like in my dream.
This is not the first time i have had weird dreams and music a few years back i had a dream about hearing a song on the radio and actualy woke up with it in my head (i had no memory of hearing it in my life) a few weaks later the same song came on the radio and i was amazed realizing that was the same song from my dreams