It's a matter of personal opinion, but I think Jennifer Aniston is the sexiest. Sorry if that only answers half of your question, but I don't find dudes sexy.
Name the sexiest female and male celebrities?
Here's two.
Blake Shelton
Angela Bassett
Oldies but the greatest ! Veronica Lake and Clark Gable.
Pierce Brosnan....sorry, I don't do women.
Charlize Theron is my dream girl. I mean, just look at that!!!!
Gwendoline Christie. OMG I'm so in love with this statuesque hunk of woman.
My favorites all the way!!
Milla Jovovich ♥ & Kiefer Sutherland ♥
Mmmm, I'll take Josh Groban as the sexiest!
This is an unpopular opinion, but Iggy Azalea and Skrillex.
Male - Richard Gere
I have to go with Tamara Taylor. No opinion on guys.
Stephen Dorff.