I normally don't get songs stuck in my head unless I really hate them lol.
One I always get stuck in my head is that song that Anna and Hans sing from Frozen. I am forced to listen to it at work because the kids love the Frozen soundtrack so much!
But the song I've had stuck I. My head today is one I actually like, called "Just Another Diamond Day" by Vashti Bunyan. It had a lot of "La lala la la"s in it, so it's easy to sing along with.