This was one of the strangest "spots" I've ever had, as I recognized Alexandra strictly from her voice as she walked behind me. Even when I saw her and got a pic, I couldn't quite place how I knew her until later - and then I was frustrated!
You see, Alexandra played the oldest daughter, Kristin, on Tim Allen's TV series Last Man Standing (where he has three girls). She was great on the show, but in the second season, suddenly, without warning, they replaced her with another actress who just wasn't the same. Nowhere could I find why they made the switch, so if I'd known it was her at the time, I would've asked her! DRAT!