Females like Lady Gaga. That's obvious.
Whoever females like (Lady Gaga, Chris Brown, Rihanna, etc.) will sell -- very few girls I know seem to understand how to download a high-quality album from Lymewire, Bittorrent, or Rapidshure.
Also, blowing money has been a female skill for decades. Ever take your girl to the mall? I promise you... if it's your money... you will cry.
SMH... When will people realize that there's a categorical difference between music that sounds good and music that sells well? The quality of the music doesn't single-handedly how well it will sell. If you're making money for profit, you're constructing the music to a completely different set of rules and goals that if you are trying to make something interesting.