How to Wear Fall's 7 Biggest Trends Right Now

This afternoon, Taylor Swift posted her full, curated Fourth of July party album. There were matching friendship swimsuits! A pregnant Blake Lively! A scared looking Ryan Reynolds! A bouncy slide! And of course, the requisite bikini portrait, which was full of some familiar squad members and some newbies.

1. Alana Haim | @babyhaim

One third of the Haim sisters (Danielle and Este are the other two members, who were also there), longtime friends of Taylor Swift. Haim opened for her 1989 World Tour last year. Their public friendship began with a string of girl crush tweets back in October 2014.

2. Britany LaManna (née Maack) | @britmaack

A childhood friend of Swift's, or as Swift describes her, "my partner in crime at Brownies sleep-away camp."

3. Martha Hunt | @marhunt

A Victoria's Secret Angel who Swift met while performing at the 2013 and 2014 Victoria's Secret Fashion Shows. They were first seen out in public together in January 2015.

3. Martha Hunt | @marhunt

A Victoria's Secret Angel who Swift met while performing at the 2013 and 2014 Victoria's Secret Fashion Shows. They were first seen out in public together in January 2015.

4. Halston Sage | @halstonsage

A 23-year-old actress who appeared in Neighbors and Paper Towns alongside Swift BFF Delevingne. She first was spotted hanging with Swift last April at a barbecue Swift and then-boyfriend Calvin Harris threw. Sage was a new inductee alongside Empire's Serayah.

5. Cara Delevingne | @caradelevingne

A top model turned actress who, like Swift, once dated Harry Styles (or so it was rumored). They had a saucy moment at the 2013 Victoria's Secret Fashion Show:

7. Abigail Anderson | abigail_lauren

Swift's best friend who just got engaged. As Swift once told Oprah, "We met when I was 15. First day of school freshman year we sat next to each other in English. She wanted to be a swimmer and go off on a college scholarship for swimming and I wanted to be a singer." Both happened. Anderson has been there for everything—Grammy dates! Party photo booths! The ups and the downs!