Rihanna's potential obsession with Instagram has been well documented in recent weeks, as the singer has posted tons of pics taken with the popular camera app. Rih Rih recently used Instagram to show off the birthday celebration she gave for her good friend Melissa Forde.

The two took a plethora of pictures together, signifying a great time spent with each other, and Rihanna even hopped on Twitter to show love for one of her best friends.

"Happy birthday to my 5 star heaux @mforde11 AKA M$$ from de crew nucci crew

Check out the pictures to see how the two got down for Forde's birthday.