Even Kate Beckinsale in tight latex couldn't save this installment in the Underworld franchise. It felt a bit like a cash grab and the plot was fairly pedestrian. She mostly shot Lycans with guns and didn't really do any Vampire-specific stuff.
There was an opportunity to see her titties in the beginning, but the movie had some careful use of fog to frustrate me. Gah. I'm not a fan of add-a-kid either.
I don't really recommend this movie, but it's not going to be the worst thing you've seen this year.