Lewis Hamilton and Nicole Scherzinger have split for good after four years together, sources said.
Formula One racing driver Hamilton and the stunning singer and US "X Factor" judge Scherzinger, who met at the MTV Awards in Munich in 2007, have called time on their relationship.
They have parted before, in January this year, citing work issues -- but friends said that this time they are treating it as final.
"Nicole and Lewis have tried to make it work but realized it's just not happening so have called it a day once and for all," a source said. "They've spoken at length about it but agreed there's no point as they never see each other. They spend their whole time on opposite sides of the world."
The source added, "Although they came to an amicable decision, Nicole is actually devastated about it. She thought Lewis was the one."
Scherzinger, 33, has been juggling her time between seeing Hamilton, 26, and her many work commitments.
In the past year, the Hawaiian-born beauty released and promoted her debut solo album "Killer Love," filmed her part in "Men in Black III" and landed the job as a judge on the US version of "The X Factor."
Meanwhile, Hamilton -- who appeared unsettled in recent weeks -- was touring the globe with his Formula One team McLaren.
As well as their careers keeping them apart, he is based Geneva, whereas Scherzinger has a home in Los Angeles' Hollywood Hills.
A source added, "They still genuinely care for each other, but they've decided to be adult about it and go it alone. There are no hard feelings."
