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Rihanna

Jason Merritt/Getty Images

It seems like Rihanna is unstoppable these days!

Between her Diamonds tour, River Island clothing line and  rumored romantic ups and downs, the sexy star is certainly playing her cards just right to always stay in the spotlight.

And this time, it's her highly anticipated MAC lipstick, RiRi Woo, that's making headlines!  

The cool cosmetic collaboration officially launched today online (they're also available at the star's concerts at Barclays Center) and apparently sold out almost immediately thereafter.

"Red lipstick all on da paper!!! #RiRiWoo #SOLDOUT #3HOURS #lookatyou #nowlookatus," the singer tweeted triumphantly this afternoon. 

Would you buy Rihanna's MAC lipstick?

PHOTOS: Check out trends from our spring beauty guide