OK! Quick Pics: Heidi Klum Pumps Iron, Taylor Swift Shows Some Leg and More!

Whether they're attending events, performing for fans or just hanging out with their families, stars seem to always be having the best time ever!

Proof? Just look at Heidi Klum working out with weights and Khloe Kardashian toting her latest accessory around everywhere.

Photos: Selma Hayek Rocks a Mustache

Photos: Stars Get Lucky on St. Patrick's Day

Who do you think is having the most fun in these new photos? Tell us in the comments or on Twitter @OKMagazine