Good German Music!

[tehxiinae]

I'm trying to better my German, and from experience with Japanese, I've found that music helps me a lot I was wondering if anyone here could recommend me some great artists. I'm particularly looking for pop/hip hop music (like Ayu, Koda Kumi, Amuro Namie, Lady Gaga, etc.) For some reason, all the German music I have now is rock (Jennifer Rostock, Panik, Fraulein Wunder, etc.)

Let me know!!! Thank you