Single Ladies. My wife and I tried to karaoke it the other day, it’s been stuck there ever since. I also do the punch dance on my way to the shower in the morning while naked.
This one - it haunts my dreams
Policy of Truth by Depeche Mode
The closing theme from Blackadder the Third…
A short gigue by Bach. I forget the exact name so I can’t find it online, unfortunately.
Excellent shower singing music. It’s even better sung when in a confined space with others.
Michigan Rag from One Froggy Evening. It kicks in at about 2:45. And never kicks out again.
Hotel California, and I’d really like to know who let it in, because I don’t like that song! AAARGH!
Actually, I do know who let it in. It was playing on the radio as I left work on Monday. Sigh…
I woke up with Green Day’s Last of the American Girls in my head.
Assorted Flight of the Conchords songs. Right this very moment it’s Petrov, Yelyena and Me, but for the past couple of days, but for the past few days Hurt Feelings and I Told You I Was Freaky have been stuck in my head the most. Good thing I’m enjoying them.
Train’s Hey Soul Sister.
Hey Hey… Hey Hey Hey Hey Hey…
Good Lord, that’s been in my head for a week now.
Waaaaaaaaaaaaay too much information. 
Beatles Roof top concert, I gotta feeling, a feeling deep inside oh yeah, oh yeah!
“Love Will Turn You Around”, by Kenny Rogers. And for the life of me, I’ve no idea why.
Sufjan Steven’s Chicago. Beautiful song, so it’s a nice earworm to have.
I just read the thread about the guy bidding the exact showcase price on The Price Is Right, and now I can’t get the goddam theme song for TPiR outta my head…
Please, Baby, Please from the new Devo album.