Yes, it is revealed! 

People magazines "Sexiest Man Alive" goes to ...

Mr. Blake Shelton!

Now Blake, sure you're a country superstar, Sure you got sexiest man alive, Sure you're on  the most popular TV show. I'm just a little jealous! Not because of the above, but because you took Gwen off the market! (Pffffffft whatever Mr. Greedy)

Greg DeLange

Checkout how he reveals it to Adam Levine