Nicole Scherzinger and Lewis Hamilton celebrate six-year anniversary in Italy and United States

Nicole Scherzinger and Lewis Hamilton have celebrated their six-year anniversary with a multi-stop trip.

The British Formula One racer and the former Pussycat Dolls singer have been in an on/off relationship since 2007, and recently marked their long-term romance with visits to both Italy and the United States.

Lewis Hamilton and Nicole Scherzinger

The sportsman told his approximately 2.16 million followers “better late than never”, as he posted a collage of their romantic moments on his Twitter page.

Using the hastags “good times” and “God is the greatest”, Lewis, 29, can be seen with his hand across his 35-year-old partner’s lap in one picture, while another sweet snapshot shows former X Factor judge Nicole nuzzling his face with her nose.

Hamptons: Lewis Hamilton and Nicole Scherzinger celebrated their six-year anniversary

The duo also raised their cocktail glasses to the camera in a toast as they posed in a Venice restaurant.

A second collage saw the pair in the Hamptons region of New York State. There they seemed to be in more of a relaxed mode as they took selfies while riding bicycles wearing jeans and T-shirts, with Lewis donning the snap-back caps he is famed for fashioning.

In his caption Lewis admitted that he felt the desire to go to the affluent area on the United States East Coast after watching the movie White Chicks. He added that they had an “amazing time” in the area where the Kardashians just happened to be filming their latest Keeping Up with The Kardashians TV show spinoff.