And the singer, 35, made sure to stand out from the crowd, wearing a $400k ANKLE watch from Jacob And Co.

The bespoke timepiece, which wouldn’t mind telling the time very easy, wrapped around her ankle, was embellished with over 70 carats of round and emerald-cut diamonds and set in 18K white gold.

She wore it over shiny black Balenciaga leggings which were attached to heeled boots as she made her way outside.

Rihanna, has a longstanding relationship with jeweller Jacob & Co. spans over a decade.

What time is it? Rihanna wore a $400k ANKLE watch to the Las Vegas Grand Prix on Saturday – embellished with over 70 carats of diamonds of round and emerald-cut diamonds

It’s magic: Jewellery brand Jacob And Co posted a close-up of the timepiece on social media on Monday

Glitzy: She wore the watch, set in 18K white gold, over shiny black Balenciaga leggings which were attached to heeled boots as she made her way outside

Tick, tock! Back in June, she wore a $670,000 watch around her neck by the same brand as a choker to Pharrell Williams’s Louis Vuitton Fashion Show

Back in June, she wore a $670,000 watch around her neck by the same brand as a choker to  Pharrell Williams’s Louis Vuitton Fashion Show.

According to GQ, the piece was an 18-karat-gold Flying Tourbillon, set with 339 baguette diamonds, on a custom alligator-embossed calfskin strap.

The watch features a hand-wound movement and 42-hour power reserve.

Jacob And Co said at the time: ‘In preparation for the fashion event, Rihanna decided she would wear a timepiece in a completely different way.

‘She came to Jacob & Co. with the concept, like she had many times before.’

Rihanna joined the likes of Cara Delevingne, Heidi Klum, Brad Pitt, Paris Hilton and David Beckham at the Grand Prix event which was won by racer Max Verstappen.

The track included a 1.2 mile straight away along Las Vegas Blvd, also known as The Strip, which is the second longest on the Formula 1 circuit.

Rihanna opted for a leather jacket, tight satin leggings and a low-cut top, while accessorising with dark shades and choosing a bold red lip.

She was joined by her boyfriend A$AP Rocky, 35, as they strolled through the paddock together.

Star power: (L-R) Rihanna, Cara Delevingne and Kylie Minogue were among the swarms of celebrities on hand for the Formula 1 Heineken Silver Las Vegas Grand Prix 2023 in Sin City

Partner: She was joined by her boyfriend A$AP Rocky as they strolled through the paddock together

Looking good: Rihanna accessorised with dark shades and chose a bold red lip

The roar: The Formula 1 Heineken Silver Las Vegas Grand Prix 2023 went off late Saturday night, West Coast time, that takes drivers around a 3.8 mile track in the heart of Vegas