One of the main go-to producers in our generation, Mr Lukasz Gottwald -- better known as Dr Luke -- has had M.A.N.Y. of singles that have been cranked out by numerous record labels over the past 8-9 years. Most of our faves have had success with said Luke.
66 singles.
1 winner.
Who will ATRL decide? - Click HERE for the Winner!
1. Since U Been Gone
2. Who Knew
3. Hot N Cold
4. I Don't Think So
5. Nothing In This World
6. Behind These Hazel Eyes
7. Teenage Dream
8. Party in the USA
9. Everything I'm Not
10. Love Me or Hate Me (this ****s, don't even try it)
Hmmm, I'm liking this top 10. Let's make it happen.
Also, bottom five :
1. Hangover
2. Hot
3. Part of Me
4. Price Tag
5. Feels Like Tonight
The Rates!
Just have to listen to like 10 songs. And looking at the list...well I'll try my very best not to be biased. 
to me