Nina Dobrev and Julianne Hough took their friendship to a new level on Thursday when they showed their bare butts during a holiday with friends in Idaho. The Dancing with the Stars judge shared the cheeky snap on Instagram, writing, "Full moons! 🌝🌝🌝," as the girls admired the actual full moon in the sky from a distance. The duo has been posting a handful of photos from their holiday, including one bikini-clad shot of the whole group by the pool. While they both showed off their washboard abs, Julianne struck an animated pose while Nina rocked her bikini jewellery like a pro. One thing is for sure, they certainly have a fun relationship.