Spears playfully referenced the outfit by assuring people she was indeed wearing something underneath and wrote: "LIVING IS GIVING … pssss don’t worry I had my first diamond thong underneath my jacket … hope I didn’t offend anyone," along with winking face tongue emojis.
Asghari matched with a black t-shirt at the reception with "Britney & Sam," adorned on it as the 28-year-old danced with his new wife.
This wasn't the only look from the singer's wedding as she was also photographed wearing a "two-toned outfit" and also a red fringed dress, Vogue reported.
Meanwhile, for the nuptials, Spears stunned in a custom white Versace off-the-shoulder wedding dress, accessorised with a long veil and white choker which was featured at the beginning of her Instagram clip where she posed with Asghari.
The pair were then filmed as they shared a kiss on a balcony before footage from the reception played which showed Spears dancing with Madonna as her iconic hit Like A Virgin, was played.
Fans loved seeing the "Queen of Pop" and the "Pop Princess" having a boogie together - in the comments, one person wrote: "Omg!!!! How iconic was dancing like a virgin with Madonna!"
"Britney and Madonna dancing to like a virgin?! This is ICONIC," another person said in agreement.