"Idol" Ramiele's Kryptonite?

TMZ spoke with Ramiele Malubay's Spanish teacher at Zephyrhills High School, who distinctly remembers something that could knock Rammy off "American Idol" -- she's extremely allergic to peanuts!

This could be vital information for fellow "Idol" contestants who might want to sabotage Ramiele if they ever feel she's a threat. Fortunately, based on previous performances, that probably won't be an issue.