Rihanna is Greenhouse Girl

Rihanna throws up the peace sign as she celebrates a pal’s birthday at eco-friendly nightclub Greenhouse in the SoHo neighborhood of New York City on Tuesday night (August 11).

The 21-year-old Bajan babe was reportedly celebrating the birthday of her publicist Jenn. Check out that tiara and birthday party hat!

Earlier in the day, Rihanna was spotted shopping at Barney’s and dining at her fave Big Apple eatery, Da Silvano.

FYI: Rihanna is wearing a a skirt from Katy Rodriguez.