A day after turning 18, Kylie Jenner has taken a trip to Mexico with boyfriend Tyga to continue celebrating her birthday. "GONE," The reality star wrote on Instagram Monday, posting a photo of her brand new $320,000 white Ferrari 482 Italia parked right next to a private jet. Multiple sources have confirmed to E! News that the pair will be relaxing in Mexico for a few days with no parties planned or family members expected to visit. Over the weekend, Jenner kicked off her birthday celebration at Bootsy Bellows nightclub with friends and family. The festivities will commence when the "Keeping Up with the Kardashians" star flies to Montreal, Canada, on August 16 for a massive birthday bash at Beach Club.