Rihanna parties with Lewis Hamilton in scantily-clad costume at Barbados' Crop Over celebration

Rihanna Rocks Barely-There Ensemble to Kadooment Day Parade

Rihanna was once again back in Barbados for the annual Crop Over festivities, and this time, she had a famous friend in her squad.

The 27-year-old singer was spotted partying and dancing with Nicole Scherzinger's ex-fiance, Lewis Hamilton, at the Crop Over's Kadooment Day Parade. The 30-year-old shirtless British race car driver celebrated wearing a backwards hat, trendy sunglasses and a colorful bandanna around his neck. Both his Calvin Klein underwear and his rock-hard abs were in full view.

WATCH: Rihanna Taped Floyd Mayweather's Mouth Shut at BET Awards

The hat was apparently covering up his new 'do. "Barbados, we ready!! #Islandlife #Carnival2015," Hamilton captioned a selfie of his hair.

While recent pics of Rihanna and Hamilton partying are sparking romance rumors, the two known each other for a few years. In Dec. 2014, the two posed together at the British Fashion Awards in London, and in 2011, they were also photographed at the Canadian Grand Prix.

Per usual, all eyes were on Rihanna and her show-stopping costume on Monday. Like those Crop Over styles from years past, the intricately beaded getup included a barely-there bra and booty-baring bikini bottoms. Rihanna paired her sexy style with a huge headdress and giant wings.

The outlandish pop star knew she looked good because she couldn't stop Instagramming during the festivities on Monday.

See all of her snaps here:

Rihanna at Barbados Crop Over 2015
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Rihanna parties with Lewis Hamilton in scantily-clad costume at Barbados' Crop Over celebration
#cropover2015 #barbados
pooch back! #cropover2015 @zuluroyals
I đź’š @zuluinternational
#cropover2015 by @dennisleupold
Eye-soul-ation #CaribbeanGal #culture
my hitta. @jennnrosales
#barbados #cropover2015

She even posted a video of her booty shaking that's nearly NSFW.

PHOTOS: Nearly Naked Rihanna Takes Over Kadooment Day Parade With Best Costume Yet

One thing's for sure, RiRi knows how to party and so does her best gal pal Jennifer Rosales, who was also in attendance.

PHOTOS: Rihanna Might Just Be the Best Bridesmaid Ever

Hamilton is one lucky guy to be partying with these gals! Squad goals, indeed.

Check out this other fun moment when RiRi finds a puppy at a nightclub:

Rihanna Found a Dog in the Bathroom and Decided to Keep Him

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