The look is largely the work of Bruce Weber. You could probably ask him about it, and might even get an e-mail reply about his working choices.
http://www.bruceweber.com
He is a somewhat controversial individual. While his
look is often emulated, it is not without detractors. You might want to read up a bit about him, such as this article to start:
http://www.glbtq.com/arts/weber_b.html
I think it is less his usage of B/W films, as it is the nature or
style he uses in his images. It can be a good exercise, or learning experience, to emulate the look that other photographers created. However, instead of becoming the next Bruce Weber, I would encourage you to develop you own unique style.
If it is more the soft B/W or
vintage look, you can get some way towards that using a few different films. Shoot TriX (ISO 400) at ISO 200 and pull process to get a softer look is one thing to try. My own people film preference has been AGFA APX100, recently reborn as Rollei Retro 100. Basically, experiment to find choices that will best express your creative vision.
Ciao!
Gordon