It really depends. In general, no. My crush is not always the hottest person I've encountered. Usually the crushing attraction I feel for them is more based on the interactions I've had with them and this in turn makes me physically attracted to them. My current crush however is incredibly gorgeous and I can say with certainty that she's one of the most attractive people I've thus encountered O. O
Hot and attractive are different to me. she's definitely the most attractive to me, but its not like she's a supermodel, if that makes sense. To me she looks better than a model or actress or anything.