Kendall Jenner showed off her bikini body  on Tuesday when she went paddleboarding in the Hamptons with another famous pal — Hailey Baldwin. The young reality star has been friends with Stephen Baldwin's daughter for some time, and the pair even wore matching bikinis  for a sunny adventure in May. Kendall is currently staying with her family at Kourtney and Khloé Kardashian's Summer place in the Hamptons, where they are filming their own Summer-themed reality show. On Monday, Kendall stayed home while Kim Kardashian took her mom and sisters to see The Fault in Our Stars  at a Southampton theater. However, the Kardashian-Jenner gang hasn't just been sticking to Long Island, as they all ventured into NYC last week to celebrate Khloé's 30th birthday with a party at a club  followed by a boat tour around Manhattan .