Thats a tough one dude!
They are all incredible beautifull girls.
If we are talking relationship then it would have to be Alba. To wake up with her smiling at me every morning would make me a happy guy. Simpsons would make me frustrated, if she indees is as stupid as she acted in her realityshow. I grew up watching Biel on 7th Heaven, so its kinda weird to see her as a hottie, but she SURE is. And she has probably the most athletic body of the three.