The Kardashian-Jenner crew arrived in St. Barts [1] on Monday and promptly hit the town wearing the perfect vacation looks [2]. Later that day, Kendall and Khloé wasted no time getting into the vacation fun, hopping on ATVs to go four-wheeling around town. The exciting activities continued on Tuesday when Kourtney, Khloé, Kendall, and Kylie all boarded a boat in their stylish swimwear [3] to go parasailing. They aren't the only stars enjoying a getaway — check out all the stars on hot Summer vacations [4] that are sure to make you jealous.