I Like Pie
Origin
Birds gotta fly, fish gotta swim, and Cappers gotta like pie. It's a law of nature. This all started back in the old Caption This days, when a Capper by the name of Joystick started a club called the ILPA, or the I Like Pie Association. The only requirement for membership was that you like pie, and who doesn't like pie?
Since then, 'I Like Pie' has become the standard catch all response for nearly every poll on the Cappers Yahoo Group. Even if none of the choices in a poll appeal to you, you can always choose 'I Like Pie'.
Aside from polls and the ol' days of Caption This, there's also a possible origin in an old, old song - very old, Britney Spears had nothing to do with it - from Episode # 913 of the bygone puppet-show, to be found and listened to, in a copy of the web content SCIFI.com used to host here ( http://www.castleforrester.com/mst3k/freebees/#delta ). The meme surfaced in aother song, When Loving Lovers Love, in an earlier episode of MST3k, #822 (1997).
South Park
In "South Park: Bigger, Longer, and Uncut" (1999) Cartman suggests adding 'Punch and Pie' to their message about the meeting of their resistence group, saying that more people will come if they think there will be punch and pie. Since then the notion that pie can entice virtually anyone to do virtually anything has become yet another aspect to the running gag.