Kylie Jenner is having the best 18th birthday ever.
Tyga joined his GF in the celebration and the two were caught holding hands, a rare sign of PDA for the usually low-key couple.
Also joining in on the festivities were Kylie's big sis, Kendall Jenner, and Hayley Baldwin, who enjoyed the day on the beach before heading out on a private boat.
The friends, who stayed at Girls Gone Wild founder Joe Francis's mansion, Casa Armara, snapped pics by the pool.
Chilling underneath the palm trees.
Even Pia Mia showed off her gymnastic capabilities.
Of course, being by the beach, they decided to hop on some jet skis, where Kylie wore a really familiar one-piece.
No, your eyes are not deceiving you; that is the same suit that her mom, Kris Jenner, wore back in the '80s.
Question is: who wore it better?