We don't usually cover men's fashions here on Fab, but we can't deny the power of two stylish men working one of the latest hottest trends. Behold Usher and Jake Gyllenhaal both rocking denim on denim. Usher trekked NYC in a denim jacket and baggy jeans, while Jake was spotted at LAX sporting a denim button-down shirt and J Brand jeans. Both men accessorized with rugged, lace-up boots, but Usher took it up a notch via a gray fedora. Take a good look at these hotties and tell me — who wore denim on denim best?