Lewis Hamilton has joined Kim Kardashian and her kids for a spring break trip.<br /><br />A source confirms to PEOPLE that Kardashian, her three younger children, Saint, 10, Chicago, 9, and Psalm, 6, are on a vacation with Hamilton, with whom Kim, 45, has been romantically linked. Kim shares the three children and daughter North, 12, with ex-husband Kanye West.<br /><br />Kim and her children are in Tokyo for spring break, alongside Khloé Kardashian and her children, True, 7, and Tatum, 3, the source tells PEOPLE.
