Spotted: Dan Humphrey and Serena Van der Woodsen on a romantic tropical vacation in Cancun — except this time, they weren't acting! They've been a rumored real-life couple for months now, but were caught kissing, splashing and being generally adorable as they showed off those beach bodies poolside. We know these photos are a little old, but they're just too hot for us to resist posting, especially since the first season of Gossip Girl had its big finale last night. As for their real life romance, Penn recently admitted, "Obviously, there's chemistry there. She's a great girl." We're already bummed about having to wait until August for more episodes, so hopefully Penn and Blake can keep things exciting for us all Summer long.