Rihanna & Ke$ha: Dancing Duo!

Rihanna & Ke$ha rock it out while performing at Madison Square Garden in New York City on Thursday (August 12).

The 22-year-old Bajan beauty is apparently a fashion inspiration for Disney star Demi Lovato. The Sonny With a Chance star told MTV, “I feel like it’s more Rihanna than Lady Gaga. I’m a huge Rihanna fan and I also love spikes and anything leather. And I have this crazy jewelry. Actually this one [ring] is pretty crazy [with all its spikes], and the bracelets have twice as many spikes. Overall, I guess you can say there’s a ton of spikes in my wardrobe!”

10+ pictures inside of Rihanna and Ke$ha, the dancing duo…