Calling all '90s fans: the London girl group (and Spice Girls rivals) All Saints are having a bit of a revival and we are obsessed. The foursome behind '90s mega hits Pure Shores and Never Ever (that's Melanie, Shaznay and Appleton sisters Nicole and Natalie) are back and playing shows again. Amazing! Back in the day, their look was all about baggy combat pants, skimpy cropped vests and shell-toe Adidas sneakers or Timberlands, not to mention a bit of tie-waist action. Green juices might've replaced Black Coffee, but everything else endorsed by the quartet is here to stay. Especially these looks…