Britney Spears is touring this summer with Enrique Iglesias.The pop star announced the news on Tuesday's Good Morning America — and gave fans a taste of what's to come by performing three tunes off her new album, Femme Fatale, which hit stores Tuesday.Watch videos of Britney SpearsSpears, who pre-taped the performances Sunday at San Francisco's Bill Graham Civic Auditorium, showed off her signature dance moves — and her killer figure — on the tracks "Hold It Against Me," "Big Fat Bass" and her latest single "Till the World Ends.""Thank you so much for all your love and support. You guys are beautiful," she told the crowd. "I love it. I love music. It's my world. It's my everything."Check out photos of Britney SpearsThe tour will kick off June 17 in Sacramento. You can check out the dates here.Watch Spears' performances below: