The pop princess touched down in London and surprised fans at Wireless festival by joining rap legend, Jay-Z, on stage on Sunday (14 July).
The 25-year-old took a break during her busy 'Diamonds World Tour' to make the cameo appearance alongside the music legend, after performing on Saturday (13 July) at T in the Park festival in Scotland.
Rihanna opted for her signature sports luxe look for the London-based festival, teaming her skirt and crop top with hi-top trainers and a beanie hat.
The 'Diamonds' singer co-ordinated her red talons with lashings of rouge lippy and showed off her extensive body art, in her skimpy outfit.
The Barbadian babe accessorised her get-up with a silver body chain and sported a stack of chunky bracelets, completing her look with a diamond grill fitted to her teeth.
Rihanna was clearly loving her new sparkly pearly whites, as she posted a pic on Instagram showing them off.
All hail, Rihanna, the queen of bling!
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Watch Rihanna and Jay-Z perform 'Run This Town' below: