Britney Spears' performed songs from her new album before thousands of fans who gathered at the Bill Graham Civic Auditorium in San Francisco, and they cheered in appreciation as the pop star expressed great passion for her art.
"I love music. It's my world. It's my everything," the 29-year-old singer said during a concert that aired today on "Good Morning America."
The concert was held Sunday before a crowd of 5,000 loyal fans.
"I love you guys. I love this city," Spears said.
Spears announced dates for her summer tour, which kicks off June 17 in Sacramento. The pop star will visit 26 cities including Los Angeles, Las Vegas, Chicago, Miami and Boston, and close with a performance in Toronto. Click here to see all of her concert dates.
Spears sang three songs from her seventh album "Femme Fatale," which is being released today.
She kicked off the concert on a high note, and donned a silver sequined body-suit as she sang "Hold It Against Me."
Each song was accompanied by highly produced dance routines -- complete with fireworks. Fans screamed their approval.
Some fans had actually camped out all night to see her.
"I thought it was amazing. She was really great," said Sarah Ammann of San Francisco.
"She's the ultimate performer. She's definitely back," added Alicia Kennon of Brentwood, Calif.
For her performance of "Big Fat Bass," Spears changed costumes and surprised concertgoers by coming out of a speaker.
Wearing a black leotard with fishnet tights, she finished up her set with the song "Till The World Ends."
Click HERE for photos from the concert.
Spears closed the show by climbing onto scaffolding on the stage. Then, fireworks exploded in the background. When Spears ended the performance, fans screamed for more.
"I thought it was good, she looked really good and the crowd was into the last song," Nick Casey of Brentwood said.
"GMA" anchors Robin Roberts and Sam Champion hosted the event. They presented Spears with a plaque from the city of San Francisco proclaiming March 27 Britney Spears day.
Spears was surprised – and pleased – by the proclamation.
Roberts described the concert as "phenomenal," saying "the energy, the people, the dancing the music, Britney -- it was tremendous!"
"Your show was fantastic, Britney. It's a hit!" he told the singer.