The songs I have stuck in my head are very random.
Lighter's Up- Lil Kim
Vanilla-Gackt (I actually have a REALLY funny story about this one I sleep with music on and one night I had this really weird dream that had absolutely nothing to do with J-Rock, so anyway in the dream Vanilla plays over and over and over again in the background, I wake up, singing Vanilla, and the VERY NEXT SONG to play is Vanilla ever since then at random times I catch myself singing Vanilla)
Miyavi-Requiem
Dir En Grey - Hades and Yokan
L'arc~en~Ciel - Killing Me
Beyonce - Check on It
No Doubt - Trapped In a Box
Peaches - Operate
Miss Kittin - Requiem For A Hit
Maar Dala (from Devda's Soundtrack)
This list is random as hell but its the playlist that my brain has had on repeat for about a month now.
Edit: You Know A Song that IS REALLY ANNOYING, "Its A Small World" In fact it torture. I'm surprised I am not crazy after this Incident. This summer we went to Disney. When we went it wasn't really crowded, but anyways I was with my lil brother and sister, they forced me to go on that ride 7 TIMES IN A ROW. I really don't think I was ever the same since that incident.