It doesn't take much for Taylor Swift to have a good time. In fact, lately she's been using every reason she can think of to celebrate -- including the birthdays of her close friend, 'Glee' star Dianna Agron, and longtime movie star Shirley MacLaine. Over the weekend, Swift and her gal pals threw an elaborate circus-themed party for Agron's 26th birthday, and the country cutie dressed up as an adorable tigress.

Early Sunday morning (April 29), the 'Mean' singer tweeted an Instagram photo of herself with her girlfriends, each of them dressed right on par with the circus theme. "The most magical night at Dianna Agron's circus themed birthday party!" she shared.

Swift donned a tiger-striped outfit and kitty gloves, tied her hair up in a tiger headband and painted a nose and whiskers on her face to complete the ensemble. Agron, who technically celebrated her birthday on April 30, dressed as a ringmaster, while the other girls mimicked flappers and lion tamers.

It seems like Swift and Agron have been spending a lot of time together as of late. Just last week, the two girls dressed up in fancy vintage dresses to celebrate Shirley MacLaine's 78th birthday -- even though they didn't actually celebrate with MacLaine. Instead, they just dressed up and went to a fancy dinner, complete with a fancy dessert, in her honor.

Agron tweeted to her fans that they should always find a reason to celebrate, no matter the occasion. "Had a long day & don't know what to celebrate later...? Because you need a moment to be young? Find your moments…," she wrote, attaching a photo of the girls dressed in vintage gowns.

C'est la vie and girls just wanna have fun, right?