Article continues below advertisementOK! can reveal Lewis Hamilton has been urged by some in his inner circle to tread carefully as his rumored romance with Kim Kardashian accelerates into the spotlight - amid fears he could fall victim to the so-called "Kardashian curse."Hamilton, 41, the seven-time Formula One world champion, and Kardashian, 45, the entrepreneur and reality television star, have been friends for more than a decade. In recent weeks, their relationship has appeared to shift gears. The pair were first linked romantically after a weekend in England and private dinner in Paris.