Pickle Staircase is better known as Katy Perry. Katy is called Pickle Staircase by her fans the KatyCats. The name came up when the mods of the KatyPerryForum changed "Katy" to "Pickle" and "Perry" to "Staircase" on april fools day 2009.
Girl 1: WTF is Pickle Staircase?!
Girl 2: duh, It's Katy Perry!