Lana is way prettier than Katy and has a lot more style, in a classy way.
Katy is too much, fashionably. With all her crazy outfits and bright colored wigs.
Mediatraffic, sweetie. Confirmed on the forum by an adminstrator. Also, another source (less reliable) is Wikipedia. It lists sales at 15 million worldwide. Please research before you go around embarrassing yourself.