Celeb Spotter: Blake Lively, J.Lo and more stars hit the town June 20

Summer has officially arrived!

Things are heating up in celebrity-land from the scorching Los Angeles heatwave to the hotly-debated political climate -- and the stars are getting in on the action. Dozens of A-listers hit a political fundraiser in New York City this week, while the LA-based celebs got outside to work on their tans.

Check out all the fun snaps above!