12/27/2012 11:35 am ET

Black Eyed Peas' Fergie on Juicing (VIDEO)

Black Eyed Peas singer and multiplatinum solo artist Fergie is known for her booming voice as well as her enviable abs. While filming "Oprah’s Next Chapter" at the California vineyard Fergie bought for her father, Oprah Winfrey discovered the secret to Fergie’s physique -- juicing!

What's Fergie's recipe for success? She says that she drinks a juice made from kale, spinach, an organic apple, a pear, half of a banana and roughage like romaine lettuce or celery. “I'm all about trying to get the toxins out now,” Fergie says in this clip. “[I’m] just trying to eat cleaner.”

However, this former child star and wife of actor Josh Duhamel doesn’t just dine on fruits and vegetables. Fergie says she will still splurge and eat pizza, meat and dairy. “I do it all,” she says. “So moderation, moderation, moderation.”

"Oprah's Next Chapter" airs Sundays at 9 p.m. ET on OWN.