CD recommendations for my 8 yr old niece

My niece is turning 8 and I am buying her a cd player. I am making her a bunch of cd's but need some suggestions.

So far I have:

One Direction
High School Musical (I know she loves this movie)
Christmas Songs

I know she is more of a Disney kid than a Nick kid, so I don't think she really knows Miranda Cosgrove, but I am checking with my sister.

Thanks

Re: CD recommendations for my 8 yr old niece

My 8 year old loves Bruno Mars, Big Time Rush, Victoria Justice, Katy Perry and a lot of other pop music. Some of it is explicit (like Katy Perry) but if you get the Kids Bop version it is completely cleaned up.