What is it about hot girls and sci-fi that excites us so much? Recently on 30 Rock Salma Hayek's character was discussing her dark secret and revealed this t-shirt:

Of course we know this is related to Battlestar Galactica, one of the best sci-fi shows Eva! The dark secret was actually that she killed her first husband, but I like to think the dark secret is that she is a big science fiction geek!