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Rihanna is the baddest of them all!

Last night, the pop diva added to her growing collection of tattoos and got some Tupac-inspired ink that reads “Thug Life” right across her knuckles.

If there’s one thing we know about this Roc Nation princess, it’s that she loves getting inked up.

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Rihanna is known for indulging in some spontaneous ink and has even flown her tattoo artist, BangBang, from NYC to her L.A. home just to add to her ink collection.

After publicly discussing her physically abusive relationship with ex Chris Brown and being a target for much gossip, the 23-year-old inked herself with a personal motto in 2009. It reads “Never a failure, always a lesson.”

Of the personal tattoo she revealed:

“It’s kind of my motto in life for everything. Instead of considering things to be mistakes, considering them lessons.”

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We’re not sure of the exact number of body art the “Russian Roulette” singer has racked up over the years, but from our count, we’d say 15 or 16.

Rihanna loves tattoo art so much, she’s even mastered doing the ink herself and tatted her infamous BangBang artist with an umbrella and “R.”

RiRi is by no means putting an end to her collection anytime soon, but check out the decoded messages of the diva’s 15 tattoos so far in the gallery!