I absolutely think this is Britney's best album ever. Womanizer is a great and addictive song =) Circus simply rules, Out From Under is a great one too..

Womanizer 10/10
Circus 10/10
Out From Under 10/10
Kill the Lights 10/10
Shattered Glass 8/10
If You Seek Amy 9/10
Unusual You 10/10
Blur 7/10
MMM Papi 7/10
Mannequin 10/10
Lace and leather 9/10
My Baby 7/10
Bonus Tracks:
Radar 8/10
Rock Me In 9/10
Phonography 9/10

I put 7 on some just to show that the other songs is a bit better, that doesn't mean they're bad =)