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Jennifer Lopez Launches Health And Fitness Brand With Summer Weight Loss Challenge

NEW YORK (CBSNewYork) -- Jennifer Lopez wants to help you get into shape with her new lifestyle brand BodyLab.

As CBS2's Jill Nicolini reported, the Bronx-native is asking you to take her challenge.

"I challenge you to be the girl of your dreams, to start losing the extra pounds that will have nowhere to hide this summer," Lopez said in a YouTube video.

JLo also took to Twitter to announce her #BeTheGirl Challenge, which encourages women across the nation to kick-start their health and fitness goals.

All you have to do is sign up for a 10-week challenge on the BodyLab website to begin receiving emails with recipe and fitness tips from the "American Idol" judge.

Next, download the free app to your phone, but you also must purchase some supplements, including shakes, Nicolini reported.

"I love some parts of it; the whole emphasis on moving, exercise and nutrition. But then when you actually start offering meal supplements in the form of shakes, that's when it starts getting a little more murky," said Dr. Robert Graham, internist with NSLIJ.

Dr. Graham also said it's important to know exactly what is in the shakes, because they may not be good for everyone.

The app does show a list of all ingredients, but do you really need to spend money to lose weight?

"As long as it doesn't cost that much that I can't afford. If I can afford, then yes!" said Mable Kombe, of the Upper West Side.

"Why would you have to pay to lose weight? Just go running for free," said Gabriela Velasquez, of the Bronx.

"(Do you think people will do the challenge because JLo said to do it?) Yea, I think they would. They buy her perfume and clothes," said Lauren Switzer, of Harlem.

"Obviously there's financial gain to these things. I can't say what the motive of JLo is, but I have to believe people do things for the benefit of society," Dr. Graham said.

The challenge includes three phases: repair and reboot; burn and build; endurance.

The five most successful participants will win a trip to New York City and get to stay at one of Lopez's favorite hotels. They will also get the chance to meet JLo.

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