I know Mujna made a list but nobody really commented or contributed and we got off topic.
I'm not going to make a top 10, but rather a compliation of my favourites. Feel free to type yours!
You Need Me, I Don't Need You - Ed Sheeran
Small Bump - Ed Sheeran
Grade 8 - Ed Sheeran
Seven Nation Army - The White Stripes
Anastasia - Slash (actually, I know/stalk a girl with the same name and she doesn't get it when I hum this next to her XD)
She's Always a Woman to Me - Billy Joel
Piano Man - Billy Joel
Down to the Old Pub Instead - Stephen Lynch