Credit: Instagram

Dancing With the StarsJulianne Hough and brother Derek Hough are best friends, but one gal is basically their third sibling: The Vampire DiariesNina Dobrev! Though we see Jules and Nina partying together more often than the complete trio, they all took a sunny vacation together this week.

In a photo collage that Julianne re-posted from friend Riawna Capri, we see them showing off their gorgeous bikini bods, matching patriotic shirts (“Made in the U.S.A.” with a giant eagle, natch) , and their fun times at the beach. This included rockin’ neon goggles while tubing, burying their friend in the sand, and staging a stunning photo as they jumped off a boat at sunset. We want to go to there.

Derek started posting photos of him driving a boat and having fun on July 6 — writing that he was wake boarding, tubing, surfing, and speedin’ around the island — and then a photo of his luggage at the airport, so we’re guessing they’re home now. But based on their dark tans in one photo (where Derek is shirtless, of course), they were there for a while and have plenty of memories from an amazing trip.

What do you think of Julianne and Nina’s bikini pics? Do you wish there was more shirtless Derek in these photos? Sound off below!