Rihanna may not be able to make it to her concerts on time, but she does knows a thing or two about beauty. The 'Diamonds' singer's lipstick for MAC, RiRi Woo, sold out in just three hours and RiRi took to celebrating with (what else?) a giant cake shaped like a tube of her signature color.

The Bajan singer posted a slew of pictures to her Instagram page with captions like, "#ririwoo in dis biatch!!! #backstagebehavior @og_ella making me arch and point!!! I was half way unconscious here tryna suck in my belly !! #fashawn." See guys, RiRi's just like us, she sucks in her "belly" for pictures too! *Eye roll*

Aside from having an elaborate photo shoot with her ginormous lipstick cake, Rihanna posted a tender (we're using that term loosely here) message to her friends and family on Instagram. She wrote, "I have the best friends and family!!! I was like an emo lil b---h!! They make me so happy! I couldn't get through this #diamondsworldtour #northamerica without your c--ts to make me laugh through it all!!!" Only Rihanna could thank her closest friends and family and subsequently insult them in the process. It's like when she said Nicole Richie made her barf, but really meant it in the nicest way possible. Everyone does that right?

The pop star's RiRi Woo shade is actually inspired by MAC's Ruby Woo, which just so happens to be Rihanna's fave. Talking about the process behind choosing her signature color, Rihanna said, "Working with MAC, it’s difficult to get a red lipstick that beats Ruby Woo, because it works on every skin tone. I had so many different samples to choose from and so many different colors underneath — blue, yellow, orange and pink bases. And I got to pick one that worked, and I tried it on all my friends to make sure it worked on all of our skin tones" Rihanna -- woman of the people!

But seriously though, who got to eat the red top of the cake?

Rihanna
Instagram
loading...
Rihanna
Instagram
loading...
Rihanna
Instagram
loading...
Rihanna
Instagram
loading...

Watch the Rihanna 'Stay' Video feat. Mikky Ekko

More From KISS 104.1