02/27/2013 AT 3:45 PM ET
Country icon Wynonna’s size is no laughing matter.
Despite playfully telling Tuesday’s Good Morning America audience about signing on to Dancing with the Stars so that she can get down to her birth weight, the singer says her health has actually become a growing concern.
“This is a great diversion for me, because it will focus on self-care, which for women – especially working as hard as I do – we forget to put ourselves on the list,” Wynonna, 48, told PEOPLE shortly after it was announced she’d be joining the cast of ABC’s hit show. “This will force me to take care of myself.”
“I definitely went into being the wife and caretaker, and I let myself go in terms of way down the list,” she says. “There were days and days and days that I didn’t walk. I’m a walker, and I’m always telling my fans how to be healthy. It’s not about size and numbers, but I can honestly say I’ve seen the pictures from when I got married and before, and I see them now and I think, ‘You know what? I deserve to be healthy. I’m worth it.’ ”
Wynonna calls her pal and two-time former Dancing contestant, Kirstie Alley, 62, her “mentor in this process.”