Kim Kardashian made sure to turn heads in a daring backless Gucci 'thong dress' as she kicked back on a yacht after Lewis Hamilton's success at the Monaco Grand Prix.The reality star, 45, dressed to impress in a daring backless black sequin gown as she arrived from her luxury superyacht.Kim looked nothing short of sensational as she went braless under the racy number and flashed the vintage Gucci thong from 1997 beneath. This particular G-string isn't some limited edition designer item that's just hitting stores. In fact, the undies are from a Gucci collection that's over two decades old.The thong first appeared in the runway as part of Tom Ford's Spring/Summer 1997 collection for Gucci and is actually part of a bikini set.It's not entirely clear just how Kim came across this thong, but it is not the first time she has worn it as she posed for Instagram snaps in 2018 in the number and supermodel Kate Moss stormed the runway for Gucci wearing the G-string in Milan earlier this year. Kim Kardashian made sure to turn heads in a daring backless Gucci 'thong dress' as she kicked back on a yacht after Lewis Hamilton's success at the Monaco Grand Prix The reality star, 45, dressed to impress in a daring backless black sequin gown as she arrived from her luxury superyacht The SKIMs mogul styled her dark tresses in a neat waved up do for the night out in Monaco and waved to fans. Kim was all smiles during her trip after supporting partner Lewis at the grand prix on Sunday where he finished in second behind Kimi Antonelli. The British racer, 41, who was first romantically linked to the Kim earlier this year, sent love to her with a sweet kiss as he accepted his second place trophy following the race over the weekend before the bubbly drenched her.The TV personality's hair was covered in the fizz as she tried to shield herself from the spray and protect her no-doubt professionally styled hair. In a short clip uploaded to the official F1 Instagram account, Kim could be seen proudly filming her beau as he was presented the trophy from Princess Charlene of Monaco - just before being sprayed.Just before Hamilton had lifted the large trophy up into the air while giving a thumbs up to his team watching from below.He then blew a kiss towards Kim, who was also nearby which caused her to flash a cheerful smile.She applauded the professional driver who stood alongside 19-year-old Kimi Antonelli who came in first place.Kim glammed up for the big day wearing a cream-colored dress that clung to her figure.While attending the star-studded race, she also unveiled the daring backless portion of the ensemble.Her dark locks were swept up into a chic updo, allowing loose strands to border the sides of her face. Kim looked nothing short of sensational as she went braless under the racy number and flashed the vintage Gucci thong from 1997 beneath The SKIMs mogul styled her dark tresses in a neat waved up do for the night out in Monaco and waved to fans Kim supported partner Lewis at the grand prix on Sunday where he finished in second behind Kimi Antonelli She looked every inch the proud partner as she watched on One day earlier on Saturday, Kardashian was also spotted supporting Hamilton during his raceShe slipped into a pair of closed-toed black heels and completed the look with stylish shades.The star was accompanied by her younger sister Khloe who was also dressed for the special occasion in a satin cream dress with a lace trim on the neckline and hem.Hamilton and Kardashian have known each other for years before recently sparking up a romance.Back in late January, the stars were seen checking into an upscale hotel in the Cotswolds.Shortly after, the pair were spotted at another hotel in the city of Paris - before they grabbed dinner together at Aqua Kyoto.An insider told Entertainment Tonight at the time, 'Kim and Lewis are spending more time together and seeing where things are going.'They've been friends and known each other for years but are now exploring a romantic relationship.'Later that same month, Kardashian and Hamilton sat next to each other while attending Super Bowl LX.The pair also spent time together in Tokyo in March ahead of Hamilton taking part in the 2026 Japanese Grand Prix. The couple also made an appearance at the Coachella Music Festival soon after. Earlier this month, Kardashian uploaded a photo to Instagram as both she and the racer had a blast during a bike rideKardashian and Hamilton were spotted kissing for the first time as they took a dip in the ocean in Malibu in April.Earlier this month, Kardashian jumped to Instagram as both she and the racer had a blast during a bike ride.Hamilton has also met the star's four children whom she shares with ex-husband Kanye West: North, 12, Saint, 10, Chicago, eight, and Psalm, seven. 'Kim's very selective when it comes to the people she allows around her kids,' a source recently told People. The insider added that the media personality is 'very protective' of her kids and 'doesn't take new introductions lightly.''The fact that Lewis has spent time with the kids reflects how much she trusts him.'