One of Lewis's most important wins of the season, it puts him only four points behind championship leader Nico Rosberg. It was also a home win for Lewis, who is from Essex.
Nicole and Lewis have been dating since 2007. Her picture showed off the gorgeous British countryside as she cheered on Lewis at Silverstone Racetrack in Northamptonshire.
The former X Facto
r judge also visited the Sunday Brunch
set on Saturday where her co-guests included Chelsea Handler.
The pair recently celebrated their six year anniversary
with a romantic multi-stop trip to the United States and Italy.
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 hashtags "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.
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.
Nicole recently spoke out about her battle with bulimia when she was the lead singer of girl band The Pussycat Dolls
, and the 36-year-old described bulimia as "a horrible, paralyzing disease".