Rihanna Oozes Flower Power

Her beloved lingerie brand Savage x Fenty recently received a $1billion valuation.

And the nine-time Grammy winner proved she was her own best advertisement while modeling a sexy 60s-inspired underwear set from the line's March collection on Instagram Wednesday.

Rihanna, 33, looked simply stunning as she spilled out of a soft green triangle top while lying on the grass and soaking in the springtime sunshine.

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