It's totally money worthy, especially the Deluxe version.
All the tracks are amazing, the bonus tracks are even better.
It's the best pop album of 2012 imo, the 1st time I listened to it, I was completely amazed by the quality of the tracks, the production, Kesha's vocals.

It is so underrated, well at least it's unfortunately unappreciated by the GP. It's such a fun album, but there is also some vulnerable moments. You don't have to be a Kesha fan to like it, seriously. It's a really flawless record.
You will not regret it, buy it !