Jennifer Lopez shows off her huge derriere in Yoga pants as she was spotted leaving gym in NYC (Details, pics)

There's no grey area when it come to Jennifer Lopez's best asset, her back side which was on full display Friday in New York City.... in yoga pants.

J.Lo still had a glow to her leaving her SoHo gym, but you'd never notice it if her butt caught your eye first.

So what does J.Lo's workout include? If it ain't downward dog, we're guessing it's a ton of squats because that booty is only getting better with age.

Who's doing retirement better than A-Rod? Absolutely no one.