The leak of the Britney Spears song 'Everyday' last week was just the tip of the iceberg. Now, unreleased Spears tracks called '911,' 'Rock Star' and 'Dangerous' have all hit the web.

Of the three new tracks, 'Rock Star' is the most impressive. "Imma just let y'all know something like this," Brit teases while an electric guitar riff kicks in. Sounding sexy and intimidating, Spears sing-raps, "Got your ass on your shoulders and you wonder why nobody ever really wanna get down and hang with you." She sneers, "X-O, know what? I never loved you."

In 'Dangerous,' Spears calls herself "a dynamite factory" and says, "Watch out, I'm feelin' nasty." The dance-pop track is the most club-ready of the three. The flirtatious '911' is built around heavy breathing and the sound of telephone buttons as Spears sings that she calls 9-1-1 when she needs companionship: "I call you when I'm feeling lonely / Baby boy, come get right on me."

Like 'Everyday,' the new tracks could have been recorded any time over the last several years, so we don't know if they were intended for 'Femme Fatale' or something much earlier. But the recording date probably doesn't matter much to Brit Fans, who are no doubt ecstatic to have new music to listen to from their idol.

Listen to Britney Spears, '911'

Listen to Britney Spears, 'Dangerous'

Listen to Britney Spears, 'Rock Star'