Estonia is home to the most beautiful women in the world. What you'll mostly have to watch out for in Tallinn is to try to stay on the road and not drive into street-lamps while looking at the ridiculous plethora of insanely gorgeous blondes.
I am jealous of your upcoming trip.
Be sure to take the ferry out to the Islands of Saaremaa and Hiiumaa...beautiful. Tallinn is incredible and has a magnificent old city; Tartu is the hottest college town in the world, absolutely exploding with ridiculously hot blondes. Did I mention that?
Hope you're single. Have fun.