Kelly Brook & BF Boobs vs. Muscles ... In BIG Staring Contest

2/5/2014 12:02 AM PST BY TMZ STAFF

British model/actress Kelly Brook used to be known for her giant ... role in "Pirahna 3D". Oh, and her giant boobs too. Now add her ex-soldier BF to the list of reasons you love/hate her.

EYES FORWARD! Quit staring ... at her boobs his muscles.