03/16/2011 03:14 pm ET | Updated May 25, 2011

Celine Dion's Hot Post-Baby Body (PHOTOS)

Celine Dion looked slim and toned Tuesday night when she performed at Caesars Palace, less than five months after giving birth to twins Nelson and Eddy.

"The world knows I just had two more beautiful babies," she told the crowd (via People). "If I come here and I don't sing a lullaby or do not show one picture with my family, I think it's going to be missing something. I love to share my private life."

After the show, Celine, 42, talked about one way she has gotten into shape so quickly post-pregnancy.

"It never ends," she told Us Weekly. "I still (breast)feed my children every four hours. So I do not have a full night's sleep."