I always wake up with the use of two alarm clocks (I've learnt my lesson over the years of using only one!), one set to the radio, the other one to a very annoying beep which really wakes me up properly! Now, the radio always plays music, so you wake up with a song. But the weirdest thing: on Monday I woke up with a song, but the song I kept humming for the rest of the morning wasn't the song I heard first thing on the radio.
Unless that song was the national anthem of Canada!