The 30-year-old “We Found Love” singer and makeup maven attended the party with her niece Majesty, who turns 4 in June.
Embracing her childlike side, Rihanna joined Majesty in the event’s pink-walled ball pit, throwing the white plastic and cream-colored balls in the air while glitter fell from the ceiling.
Photographers captured the aunt-niece duo in action as they smiled and laughed while playing together.
Outside of the ball pit, both looked glam as could be for the launch.
Rihanna wore a strapless black leather Versace mini dress, which she accessorized with a black belt featuring an extravagant, eye-catching gold buckle. She paired the look with a bevy of gold and diamond bracelets and strappy gold sandals.
Her makeup — Fenty, of course — was soft with a rosy cheek and bronze-colored lip. As for her hair, Rihanna wore her trademark dark locks down.
Majesty, meanwhile, rocked a floral dress with white socks, brown shoes and a red bow. Her hair was pulled back in two top buns with green hair fasteners.
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Rihanna’s night out comes as she launches Fenty’s spring line, out in stores now.
Makeup junkies freaked out when the star showed off two of her new creations, ultra-shimmery liquid body luminizers appropriately named Body Lava, which she revealed on Fenty Beauty’s Instagram account Monday night. “Say hello to the brand new #BodyLava @fentybeauty,” Rihanna captioned a photo of the two bottles on her own Instagram Story.
Since Fenty Beauty first hit shelves last year, the makeup world has gone wild for Rihanna’s collection. The collection — for both men and women — includes 40 shades of foundation with lipstick shades from beige to navy. Among her celebrity fans? Stars like Viola Davis and Get Out‘s Daniel Kaluuya.