Daring stars fly high in "Circus"

If you've harbored fantasies of running off to join the circus, the new unscripted series "Celebrity Circus" may give you pause. Under the big top, eager celebrities will show off skills that include performing with "fire knives," swinging from a trapeze and walking along a tightrope.

Jason "Wee-Man" Acuna of MTV's "Jackass," singer Blu Cantrell, actress Stacey Dash, Olympic swimmer Janet Evans, model Rachel Hunter, and actors Christopher Knight (Peter on "The Brady Bunch") and Antonio Sabato Jr. are coached by circus experts and will attempt stunts for an audience each week. Viewer votes will determine who goes home after each round. Joey Fatone is ringmaster.

"Celebrity Circus" premieres tonight.