First and foremost, do what others have suggested. Don't tell the reader about their physical features in an attempt to convey "hotness." Why not try something a little different. Convey to the reader the character's hotness not only by the reactions of others, but with the actions of that very character. Hotness is not all outward physical appearance. In fact, see if you can make the character attractive without saying a single thing about his/her hair, eyes, physical build, or any of the other things a person could get from a two-dimensional photograph.
Like others have said, attractive is a matter of personal taste. For God's sake, some women even think men with heavy black eyeliner are hot!
It seems to me that too many novels rely on a laundry list-type description of physical features. And when they do that, the women are model thin (with big breasts, or course) and Barbie doll facial features. And the men all have cut muscles with an eight-pack instead of the normal six, and, oh yeah, bulging biceps. And they all must be either rich, or one of them is secretly rich. And they seem to find a way to exotic places on the globe.
If you have to provide physical description, remember that physical beauty (hotness?) can be found in MidSizedTown, USA (or wherever you live). Observe and see what it is that makes people on the street seem attractive. Don't use the airbrushed photos in magazines as the standard.