Jennifer Lopez Shows Off Booty in Yoga Pants

There's no grey area when it come to Jennifer Lopez's best asset, which was on full display Friday in NYC ... 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.