Beyonce shows post-baby body in red dress

Slideshow posted in Photos | Wednesday, February 08, 2012

6 of 6: Liza Minnelli and Jay-Z backstage at Carnegie Hall before Jay-Z performs to Benefit the United Way of New York City and the Shawn Carter Foundationon February 6, 2012 in New York City.

Minnelli sang the song 'Single Ladies,' one of his wife Beyonce's most successful singles, in the film 'Sex and the City 2.' ( Photo / Kevin Mazur/WireImage)