Demi Lovato gets all smiley after blowing out a candle on an early piece of birthday cake as she visits FOX & Friends in NYC on Wednesday morning (August 18).

The 17-year-old singer, wearing LOFT’s gold chain and gem bracelet, recently caught up with MTV about her tour style inspirations. She shared, “I feel like it’s more Rihanna than Lady Gaga. I’m a huge Rihanna fan and I also love spikes and anything leather.”

Demi continued, “I have this crazy jewelry [Nicolina Royale]. 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.”

FYI: Demi wore Hudson Grey Ash Skinny Jeans and VSA Double Point Cuff.

10+ pics inside…