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Topless photographs of Britney Spears have appeared on the internet.

The Toxic singer is seen in several shots covering her nipples with bright red flowers and crouching on a rock in a botanical garden.

Britney, who is pictured wearing a fedora, brown wig and sunglasses, posed for the photographs at a friend's house last month, according to Us Weekly magazine.

Meanwhile, Britney's tour bus was stopped by police for speeding before her comeback performance on Tuesday.

Police halted the vehicle at 3pm outside a diner 30 miles north of San Diego, after receiving several 911 calls.

The bus driver - who was driving Britney to San Diego's House of Blues club for her first live performance in almost three years - claims he was trying to get away from pursuing paparazzi.

Police let the driver off with a warning.

Britney continued her mini-tour last night.

She performed a 12-minute set at California's House of Blues in Anaheim, opening her performance with a lip-synched rendition of ...Baby One More Time.

During her rendition of Breathe On Me she treated one lucky male fan to a raunchy lap dance.

The 25-year-old didn't showcase any new material instead opting to perform her biggest hits, including I'm A Slave 4 U and Toxic.

Fans desperate to see Britney paid up to US$500 for tickets with a face value of US$35.

Britney is set to appear at Los Angeles' House of Blues tonight and Las Vegas' House of Blues inside Mandalay Bay on Sunday.