The One Wherein There Is A Big Twist (2) - S2-E1
Continuity mistake: When the nose of Speedy Gonzales begins to bleed during the new housemate interview, he asks whether he can use the bathroom again and then speeds off. In that instant, the tuft of hair changes color from dark brown to light brown (the color of his skin).
Answer: She was in the show 90210, so I'm guessing it's a reference to something she did in the show?