Here's the photo being taken... Justin's mate has some SERIOUS Instagram skillz! This image appears in the gallery:Who Does The Leg Belong To? We Reveal Justin Bieber's Mystery Lady's REAL Identity 7. Here's the photo being taken... Justin's mate has some SERIOUS Instagram skillz! So it's a blonde... click next to see the mystery lady revealed! Picture: X17 8 images See the full gallery: Who Does The Leg Belong To? We Reveal Justin Bieber's Mystery Lady's REAL Identity