I remember a video of a pie fight involving Fleetwood Mac being posted years ago, but it was of pretty poor quality and Stevie Nicks was barely in it. I found a pic from it that is pretty good, and hopefully not posted here before. I'm guessing that's Christine McVie with her.
If Anyone Falls for that old pie-in-the-face gag, it figures it would be Stevie. She once wrote a song celebrating Mabel Normand, who is credited by Mack Sennett with inventing the pie-in-the-face gag, for God's sake!
I remember back in 1985, the always irreverent CREEM rock magazine ran a review of Stevie's latest album, Rock a Little, that began "Just look at that cover. Is she begging for a pie in the kisser or what?" (It's a black and white photo of her in a very old fashioned looking dress, which perhaps reminded the reviewer of very old Hollywood.)