Even Jennifer Lopez once felt "insecure and uncertain" about her body.

When you think of Jennifer Lopez, the words "body insecurity" probably don't come to mind. While Lopez defied the conventional wisdom surrounding what the "ideal" body type is in the late 1990s (hint: there is no ideal body type), she never tried to be anything but herself, oozing confidence and self-assurance.

But even Lopez has had moments when she was "insecure and uncertain" about her body, she told the crowd at the Daytime Beauty Awards in L.A. on Sunday. Lopez was onstage to present her personal trainer, Tracy Anderson, with the award for excellence in fitness when she opened up about how Anderson motivated her to feel better about her body after Lopez gave birth to her twins, Max and Emme, in 2008. She opened up.

"I've been doing a lot of reflection lately, looking at my past in order to fully embrace who I am now," Lopez told People.

"And I'm remembering how Tracy has blessed every version of my body over the years, inspiring and encouraging me to keep rising as my own life and needs change."

Lopez said Anderson came into her life around the same time she became a mother: "I met Tracy right after I gave birth to my twins. 'After the birth, like most new moms, I called her when I was anxious and worried about whether I would ever get back to my old self. She came into my life and helped me accept the new me.

Lopez is fierce and successful, but as she told People at the Hollywood premiere of her film "Shotgun Wedding" in January, about being a performer, "You always show your best. But I'm just a human being like everybody else."

According to E! News, Anderson has trained with Lopez as well as Kim Kardashian and Jennifer Aniston. As for Anderson, Lopez said that there is "no craziness in her methods," just a dedication to healthy living so that Anderson's clients can be "in the best shape of their lives at any point in their lives."

"I really feel fortunate to have trained with very smart and clever people who really care about their art and their longevity and ability to do that art," Anderson told E! at the event. And Anderson told E! at the event that she recognizes the "toxic part of our culture" that fuels body insecurity, and that for her, "it's not about being a certain size or having perfect skin or shiny hair or a certain bra size or butt shape. It's much deeper than that. It's something that lights up the depths of your eyes and your soul, and it's not something superficial."

She also says, "It's not about being a certain size, or having a certain bra size, or having a certain ass.