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OTRC: Beyonce reveals she lost 60 pounds for Atlantic City shows

Beyonce performs at Revel in Atlantic City, N.J., for the resort's premiere on May 25,2012. (Beyonce.com/photos-videos)

Beyonce is making her big post-pregnancy concert comeback over the Memorial Day weekend with a four-night run in Atlantic City, New Jersey, and the singing superstar reveled at a recent show she shed 60 pounds to get in shape for the shows.

Beyonce gave birth to daughter Blue Ivy Carter in January and told her audience on May 26, according to Us Weekly, "Y'all have no idea how hard I worked ... I had to lose 60 pounds. They had me on that treadmill. I ate lettuce!"

The 30-year-singer showed off her slimmed down figure in one-of-a-kind revealing Ralph & Russo designs, which featured 500,000 Swarovski Elements crystals.

"Now tonight I'm gonna get chocolate wasted," she later added about celebrating, quoting a line from the Adam Sandler and Chris Rock 2010 film "Grown Ups."

President Obama's daughters Sasha and Malia were also in attendance of the May 26 show with their mother, First Lady Michelle Obama.

Beyonce is performing the shows at the Revel Resort in New Jersey. Tickets for the performances, held in the 5,500 capacity venue, sold out quickly.

Prior to her debut, Beyonce released a video where she discussed her "back to work" performance and showed all the work that went into the effort, including getting back in shape and choreographing the shows.

"I'm feeling a little nervous. I'm enjoying being a mother, so it's a bit like coming back to my old job," Beyonce said in the video (watch below). "It's a little strange, but it's important that you don't lose yourself and you still have your own passions. I'm back to work. I'm back in business."

The songstress announced the Revel concerts in March and tickets for the event went on sale on April 6.

Beyonce and Jay-Z, who married in 2008, welcomed their daughter on January 7 in a New York hospital. The rapper then released a song about the baby, called "Glory."

Watch Beyonce's preparation for her Revel Resort performances in a video below.

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