Nicole Scherzinger, Lewis Hamilton holiday in Aspen

London: Former Pussycat Dolls star Nicole Scherzinger and Lewis Hamilton have jetted off on a holiday to Aspen, Colorado.

The on/off couple, who started dating in 2007 after meeting at the MTV Europe Music Awards in Berlin, have fuelled speculation their relationship is firmly back on track by flying to enjoy a skiing holiday with the Formula 1 star`s family, reported Daily Mirror. The `X Factor` judge posted a picture of herself on a snowmobile in front of a sunset on her Instagram profile, with the caption: "What better way to kick off 2014 in God`s Country! Praying and snow mobiling! Everything! Glorious." Hamilton, 28, posted a similar photograph of himself in the same location less than an hour later with the caption: "Great way to enter the year....Snowmobiling with Gods view. Truly am blessed to have a great family with me and one love."