The 'We Are Never Ever Getting Back Together' singer shared photos from their trip to Pfeiffer Big Sur State Park in California via Instagram, showing the girls having fun in the forest.
Taylor captioned one photo: "California, here we come, right back where we started from… ROAD TRIP!" That was a reference to the song 'California' by Phantom Planet, which served as the theme song for The O.C.
She later wrote: "Beach, forests, cliffs, Northern California, sand, flower picking. Best road trip ever."
We're starting to lose track of how many celebrity friends T-Swift has!
Just last weekend she was mingling with the stars at the Academy Awards, including close friend Ed Sheeran who accompanied her on tour last year.
She's also been hanging out with New Zealand teenager Lorde in recent weeks, as well as Romeo & Juliet star Hailee Steinfeld.
And, of course, we know she's close pals with Selena Gomez and Demi Lovato. She's also namechecked Spider Man star Emma Stone as another bosom buddy.
In an interview with Ryan Seacrest last year, country star Taylor admitted to having a whopping 15 best friends but declined to go into specifics about who they are. Probably wise so as not to offend anyone...
We reckon her schedule is jam-packed with socialising already but if she ever fancies a sixteen then we'll be first in line!
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Watch Taylor's video for 'We Are Never Ever Getting Back Together' below: