I took some ZMA before going to bed to help me sleep. It worked.
As a result, I really didn't have a definite song rolling around in my head. I did come across a song that tends to get stuck in my otherwise empty cranium playing on the radio this morning. "Little Girl" by Syndicate of Sound.
Funny thing about this song is the lyrics don't really stand out when they get into my head. It's the jangly guitar riff I find to be catchy. Syndicate of Sound also stands out for being the band who beat out The Golliwogs in a San Jose battle of the bands. The prize was a recording contract and release of the winning song as a single.
The Golliwogs took the loss particularly hard; went back and regrouped as Credence Clearwater Revival and were never heard from again.
Wait.
Note: If you have some difficulty sleeping, I highly recommend ZMA (zinc, magnesium, and some other shit). Three before bed, and you're good to go. The dreams will be vivid as well.
Available through most vitamin shops and on eBay.