Hide the bottles — Britney Spears is making her own "Truth or Dare."

The singer is shopping a reality series that will document her backstage life similar to Madonna's classic 1991 documentary, which famously included a scene of the pop superstar using a bottle to demonstrate a risqué act.

The show is being pitched under the title "OnTourage," according to a spokesperson for Spears.

Footage from the six-week European leg of her Onyx Hotel Tour, which begins April 26 in London, would be compiled into six episodes selling for about $1 million apiece, much more than most reality programs. Britney would narrate and shoot some of her own adventures with her dancers and handlers herself. The show could be finished as early as summer.

The Onyx Hotel Tour, which kicked off March 2 in San Diego (see "Britney Strips, Gyrates, Sweats, Flirts At Tour Kickoff") and wraps up its first leg Wednesday in Auburn Hills, Michigan, has filled about 85 percent of the venues' capacities, compared to 84 percent for the Ladies First Tour with Beyoncé, Alicia Keys and Missy Elliott, and 90 percent for Clay Aiken and Kelly Clarkson's Independent Tour, according to Billboard figures.

Spears has just released "Everytime," the third single and video from In the Zone (see "Britney Says Controversial New Video Is About Reincarnation").