Doesn’t Ri-Ri scrub up well!

We’re used to seeing her donning an array of racy attire, but Rihanna looked positively demure in a stunning lilac bridesmaid gown yesterday.

Her assistant Jennifer Morales married Aaron Davis on a secluded beach in Honolulu, Hawai on Monday, and Ri-Ri was one of six bridesmaids.

Rihanna’s dress boasted an embellished waistband, v-neck drop back, and intrinsic silver floral detail on the mesh skirt. The superstar singer kept her accessories simple with diamond stud earrings and a matching diamond necklace. Her newly auburn hair also perfectly complemented her attire, and she carried an elegant bunch of cream roses tied with a cream ribbon on the stems.

She took to her Instagram account to praise the happy couple, calling Jennifer her “sis”. “A wedding is a celebration of a marriage!!!,” Rihanna said, adding: “Celebrate the marriage that we've been lucky enough to witness grow and evolve for all these years!!!!”

The singer has been furthermore sharing on social media exotic snaps from her break in Hawaii – a favourite holiday destination – over the last number of days.

The single 27-year-old is adamant that she won’t be next up the aisle, however, recently telling Hello! magazine that she’s far too busy for a man. Between 2008 and 2013 she famously had a controversial on-off relationship with Chris Brown. Earlier this year she had been linked to Academy Award nominated actor Leonardo Dicaprio, but she dismissed the rumours last month.