X Factor judge Nicole and Formula One driving ace Lewis got together after a heart-to-heart at her Beverly Hills mansion last week, reports the Sunday Mirror.
It is believed Lewis got in touch with Nicole to suggest that they meet up in Los Angeles and she agreed. Nicole was already in the States after performing the National Anthem at a Los Angeles Dodgers baseball game, meanwhile Lewis had a three-week break from racing.
A source close to Lewis told the newspaper that it was "the last opportunity" for the couple to "talk through their future."
"They desperately want to be together but they know that from now until Christmas is going to be really tough," the source added.
Nicole and Lewis, who have been dating on and off for five years, split up in July due to hectic work schedules. Their split came despite rumours that Lewis was planning to propose to her before their sixth anniversary.
Since their split, Lewis has been particularly vocal about his heartbreak and revealed in an interview last month that his world had been "turned upside down."
But Lewis still seems to be pining for Nicole after tweeting on Saturday (10 August): "Roscoe & me on a road trip....only, someone's missing. #partnerincrime." Nicole is now back in the UK working on the bootcamp stages of the X Factor.