Ruben Studdard -- the American Idol winner -- recently lost 100 pounds by going VEG.

Ruben explained his weight-loss on The Wendy Williams Show, saying, "I went to vegetarianism about a year-and-a-half ago, and then about 6 months ago I started being completely vegan." We love that story!

Ruben continues to explain how incredible vegan food is and brags about his vegan mac and cheese and greens. Yum!

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