(Photo: Courtesy Nutrisystem)

Janet Jackson recently joined the growing list of celebs that endorse weight loss programs. The singer reveals her trimmed body in two form-fitting ensembles for a Nutrisystem commercial that will air Monday, April 9.

"For Janet, it's about feeling good," a rep for the program said without revealing how much weight Jackson has lost while on the program.

She signed on to become a spokesperson for the weight loss program late last year and in December told Us Weekly that she's struggled with her weight her entire life. "People can relate to me because I have lived it. I truly understand what it's like to have a problem with weight loss, losing too much weight or gaining more than you desire to and becoming unhealthy," she said.

During a visit to The Tonight Show with Jay Leno in January, Jackson said her heaviest weight was 180 pounds, which she gained while prepping for a movie role. After brother Michael Jackson's death in 2009, rumors began swirling that it led the singer to gain more weight from emotional eating.

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