1 of 37
There's nothing like a good girls' night in! For Swift and Ballerini, that means curling up in the window seat for coffee and convo – and since they're both musical superstars, we assume a little bit of songwriting went down as well.
2 of 37
Now, this is how you spend a day off! Swift caught up with Lively in between December tour stops in Australia, where the pair hit up the Warner Bros. Movie World theme park. Swift and the actress, who's down under shooting The Shallows, also made another new addition to their squad: an adorable photobombing kangaroo friend.
3 of 37
When you're part of Swift's crew, there's no such thing as a low-key reunion, so it seems appropriate that when Lorde flew over from New Zealand to hang with her BFF, it was so they could perform in front of thousands of screaming fans. After all, Swift's fans are all unofficial members of the Squad, so why shouldn't they get to celebrate Lorde's return as well?
4 of 37
HAILEE, GIGI, LILY AND LENA
What's the only thing better than making the coolest music video of the year? How about pulling a bunch of supermodels and celebrities together to bring it to life onstage?
5 of 37
GIGI, MARTHA, LILY, BEHATI, CANDACE, KARLIE AND UZO
For most of us, getting to see Swift in concert would be an evening to remember for a long, long time. For Lily Aldridge, Cara Delevingne, Karlie Kloss, Martha Hunt, Gigi Hadid and Orange is the New Black star Uzo Aduba, getting to dance onstage with Swift herself at MetLife Stadium is just a typical Friday night. Sigh.
6 of 37
SEE YOU ON SNAPCHAT
Click here to head over to PEOPLE's Snapchat Discover channel, or scan our Snapcode using the Snapchat camera. Meet you there!
7 of 37
US WOMEN'S NATIONAL SOCCER TEAM
Sure, you might have been thrilled to see the U.S. Women's National Soccer team win the World Cup, but there's no way you were more excited about it than Swift was. There was a giant "U.S.A!" chant and everything.
8 of 37
MARTHA, GIGI, HAIM AND SERAYAH
There ain't no party like a Taylor Swift party because a Taylor Swift party looks amazing on Instagram, features all of your dream best friends – including Empire star Serayah, Hunt, Hadid and all of the Haim sisters – and basically redefines the phrase "Squad Goals." Case in point: Swift's epic Fourth of July bash.
9 of 37
KENDALL, CARA, MARTHA, KARLIE AND SERENA
Couldn't get tickets to Glastonbury this year? Stuck watching Wimbledon on TV? Swift's got you covered: Just get tickets to one of her 1989 World Tour stops, and you'll probably get to see all of your favorite models, actresses and athletes in one place. Now that's what we call a grand slam – right, Serena?
10 of 37
11 of 37
12 of 37
HAILEE, CAMILA, SELENA, JAIME & MORE!
13 of 37
14 of 37
The Haim sister gives Swift a piggyback ride through the Maui ocean because, well, that's what friends are for.
15 of 37
We imagine it's pretty tough keeping up with all of your friends' successes when your posse includes supermodels, movie stars and fellow chart-topping artists, but it's NBD for Swift. "Got to see Emma KILL IT in Cabaret last night!" she wrote after catching Stone's Broadway show. "Every new project she takes on is even more excellent than her last, and it has inspired me since the day I met her 7 years ago."
16 of 37
KARLIE, GIGI, MARTHA & ASHLEY
17 of 37
18 of 37
KARLIE, HAIM, JAY Z, BEYONCé, JUSTIN & SAM
Our invite must have gotten lost in the mail, but, luckily, Beyoncé, Jay Z, Justin Timberlake, the ladies of Haim, Karlie Kloss and Sam Smith made it to Swift's 25th birthday blowout in N.Y.C. (Other guests not pictured: Selena Gomez, Chrissy Teigen and Nick Jonas – we'll let her guy friends have a pass just this once.)
19 of 37
20 of 37
21 of 37
22 of 37
23 of 37
24 of 37
For an urban rooftop "picnic" with Dunham, Swift didn't lie down on a blanket – she wrapped it around herself! Though there were no visible signs of food (or grass, ants or Frisbees), the singer apparently had a ball, giving an Instagram shout-out to her pal on May 13, when the Girls star turned 28. "Happy Birthday to my favorite person to have picnics with. the magical, kind-hearted, wondrous @lenadunham."
25 of 37
26 of 37
And Kloss isn't the only Victoria's Secret Angel still hanging with Swift after buddying up at last year's fashion show: Aldridge showed the singer some serious moves – though they weren't on the catwalk. "Lily, giving me major Audrey Hepburn vibes, while schooling me at pool," Swift wrote on Instagram.
27 of 37
If their friendship ever turns into a professional collaboration, you think Swift could fill in for Mrs. Dunphy on Modern Family? "We decided we were dressed like a strait-laced mom and her rebellious teen daughter," Swift wrote on Instagram after clocking in some quality time with Hyland. "#YouDontUnderstandMeMom!!! #StormsOut #ComeBackHere,YoungLady!"
28 of 37
29 of 37
Also hitting the kitchen with Swift: Garten, the Barefoot Contessa, whom she described as her "HERO." She spent the day in the Hamptons cooking with the Food Network star – "how bad could that be?" she added.
30 of 37
Is there anyone more qualified than Swift to show a music industry newcomer the ropes? So it's no surprise she hit it off with Lorde – dream duet partner, ay? – when the 17-year-old arrived on the scene. Lorde even described Swift as one of the only young musicians with "real teenage voices," and the freshly minted besties have made time in their busy schedules for beach trips and birthday celebrations.
31 of 37
Does Swift have a future in modeling? Not only did she put her angelic side on display to perform at November's Victoria's Secret Fashion Show, but she also shared camera time with one of the brand's most picture-perfect posers, Delevingne.
32 of 37
33 of 37
34 of 37
Friend – or fan Girl? Girls star Dunham enjoyed her backstage access to Swift's March tour stop, which she dubbed the "most life-affirming thing I've experienced (NOT hyperbole)." Before heading to Newark, N.J., to catch the show with her crew (including model Jessica Stam), Dunham praised the Red singer on Twitter, "If [Swift had] been here when I was in college, I would have written papers on her, not Sylvia Plath."
35 of 37
Spotted! Former Gossip Girl star Szohr shared some "#goodtimes" with Swift and some pals in a series of photos she posted in May. But it's not all play for the gal pals: The singer put Szohr to work in her music video for "22," which featured her "real-life best friends," she told Good Morning America in March. "I never had this much fun shooting a video."
36 of 37
Talk about a French connection! "Had the best day off in Paris, meandering around, laughing hysterically," Swift wrote after her très chic January outing with Steinfeld.
37 of 37
Celeb Quotes of the Day: Lupita Nyong’o, Jennifer Aniston & More
The Harvey Weinstein Scandal: All of the Hollywood Figures Who Have Spoken Out Against Movie Mogul
Kim and Kanye Are in 'Full Nesting Mode' for Baby No. 3, Plus the Inside Scoop on Meghan Markle Meeting the Queen
Jennifer Garner Gets All Dressed Up, Plus The Rock & Much More
How Jordan Fisher Is Powering Through Multiple Injuries on DWTS: 'Adrenaline Is a Big Factor'