Thank You for Being a Friend (Fluff, 5)
Unbeknownst to Zachary, Victoria was actually in the habit of taking in his show from time to time, when her own rather demanding schedule required it.  Of course, being somewhat temporally inconsistent made grading and making lessons much less time consuming than some teachers had it.

And she did have to admit, Zachary was a talented showman.  Even if he did use such groan-worthy lines as "How many men in the audience tonight are in love? ... And the women? ... Okay, all the men who were with a woman, and she responded when you didn't? Get ready for the car ride of your life going home, boys."

So she was waiting for him backstage afterwards.  She didn't have a backstage pass, of course, nor would any of the security personal be able to say they had seen her get back there.  She had simply gone there.  And until she was ready to be noticed it was like she was not there.  Another useful talent.