Hee hee hee! She was on her knees!

Britney Spears Cancels Tour Due to Knee Injury
LOS ANGELES (Reuters) – Pop princess Britney Spears on Tuesday canceled an upcoming North American summer concert tour due to a severe knee injury she suffered while shooting a video for her latest single last week.
News of her tour cancellation came just as another high-profile female solo act, Courtney Love, postponed her summer concert dates as she faced mounting legal problems due to drug possession charges and assault charges in two states.
Spears, 22, who underwent arthroscopic surgery on her left knee in New York last Wednesday, must remain off her feet for six weeks with her knee in a hard brace, followed by at least eight to 12 weeks of rehabilitation, her Jive Records label said in a statement.
Consequently, Spears’ 36-city “Onyx Hotel Tour,” which had been set kick off June 22 in Hartford, Connecticut, and run through Aug. 15 in Bakersfield, California, has been called off, Jive said, adding she “hopes to revisit those cities in the future.”
The tour was being promoted by Clear Channel Entertainment, a unit of Clear Channel Communications .
The singer’s knee gave out last Tuesday while she was performing choreography on a late-night video shoot in Manhattan for her latest single, “Outrageous.”
A previous knee injury while performing in Illinois forced Spears to cancel some concert dates earlier this year.
Spears shot to superstardom as a teenager with her 1999 debut album “…Baby One More Time.” Her latest album, “In the Zone,” was released in November.