Rihanna is the Last Girl On Earth

Rihanna and her BFF Melissa Forde step into a medical building on Thursday afternoon (April 8) in Beverly Hills, Calif.

The 22-year-old “Rock Star” singer explained the name of her tour yesterday before performing at American Idol. She told ET, “I like to think about myself as the Last Girl on Earth because sometimes people make decisions based on the outlook of others and, you know, to me, my life is my life. It’s my world, and I’m going to live it the way I want to. That’s how I think about everything, that way I’m focused on me, and my work. It’s a really narrow space, a focus.”

Rihanna is also busy planning Katy Perry‘s bachelorette party.

10+ pictures inside of Rihanna, the Last Girl on Earth…