Waking up with a song playing in your head

Does anyone else have this happen to them? A few times now in the past couple of months, I've woke up with a random song playing in my head. It woke me up. Like the radio was on, but it wasn't. I had to search for the song, because I only knew a few words, but I could clearly hear the melody. Today it was Avril Lavigne's I'm with you...not even one of my favorites...I know I haven't heard it recently. Thoughts?