Even if men don't advertise which celebrity hairstyle they are copying or that they use styling products, they are copying and they do use the products, just like women. Men tend to use products such as mouse and gel, although newer hair products such as putty are beginning to make their way into more and more men's hair styling regimen.
When men watch celebrities, with whom are they most interested in? Tom Cruise, Brad Pitt, perhaps David Beckham? Who ever it is that men tend to watch, they too go to their barbers and ask for specific celebrity hairstyles. The difference between men and women is that they don't necessarily tell each other that their hair is styled after a particular celebrity.