Kirstie Alley's Dangerous 'Dancing' Diet

"Dancing with the Stars" contestant Kirstie Alley looked slimmer than ever on Monday night, but her tumbles in rehearsal could mean she's not eating enough, after admitting she's only on 1,400 calories a day.

"A lot of the falling was my blood sugar, I think," confessed Alley to "Extra's" special correspondent Tony Dovolani. "I thought that was what I was supposed to have!"

Still, she was appreciative of judge Bruno Tonioli's comments that her "body was shrinking" but her "talent was huge." Kirstie laughed, "I'd rather have my dancing big than my ass, so I'm forever indebted, Bruno. Thank you!" Watch the performance!

Contestant Ralph Macchio battled an injury in rehearsal and scored his lowest points to date. "Pain just took me right off my feet," he told Dovolani.

And Hines Ward talked to Dovolani about his run-in with the police last week in a stolen car mix-up. "It's a scary thing having guns pointed at you, but it was a misunderstanding. They apologized."

See who will be voted off "Dancing with the Stars," Tuesday on ABC.