Full Video : Britney Spears Steals Hearts At San Francisco Show

Britney Spears writhed and gyrated through a free concert in front of 5,000 screaming fans last night.But the Femme Fatale's concert was also filming the gig for Good Morning America which will be aired on Tuesday morning.Before Spears even hit the stage, five fabulous drag queens warmed up the crowd and declared their adoration for the femme fatale herself. Their sassy back-and-forth was followed by Cheer SF, a cheerleading act.



After the room was sufficiently warmed up, "GMA" hosts Sam Champion and Robin Roberts came onstage to introduce Spears.From a set that mirrored the one used in her Las Vegas show two nights ago, Spears kicked off with her lead single, "Hold It Against Me." She dazzled the crowd with an engaging performance, dancing around in a stunning silver bodysuit. After the song, she smiled, telling the crowd "It's beautiful" being in San Francisco to perform for them.

After a change of clothes into a body-hugging, black bodysuit, Spears got sexy for the will.i.am collabo "Big Fat Bass." As she shimmied to the thumping track, fans cheered along.

Spears even gave a shout-out to the local gay youths who were in attendance from the Larkin Street homeless shelter and the LYRIC center for LGBT youth. "They're in the front row; thanks for coming," she said.

"Till the World Ends," to cap off the performance. After her last song, an excited-looking Britney gazed at her fans and told them she was looking forward to releasing her new album: "I love music. It's my world, it's my everything."

Before she left the stage, Brit was presented with a certificate from the city, and she thanked them exuberantly for the super reception.