'American Idol' Booty Shorts Girl Jennifer Diley — Steven Tyler PROMISED Me I'd Go to Hollywood!

The midriff and booty baring girl who got booted from “American Idol” is pissed at Steven Tyler … because she claims he approved of her skimpy outfit before her audition… and even told her she “already won the damn thing!”

Jennifer Diley was dismissed Sunday night after attempting two songs — “With You” by Jessica Simpson and “Hero” by Mariah Carey. Jennifer tells us she was thrown off because she hadn”t rehearsed either song — and was forced by producers to pick from a list of “flirty” songs. 

Jennifer is mostly ticked at Steven though. She says he loved her barely-there tube top and booty shorts 10 minutes before she sang — but then sat silently as she was ridiculed for it. 

FOX had no comment about Jennifer”s song list claim. As for Steven — his manager Eric Sherman says, “You are telling me some provocatively dressed woman is claiming Steven Tyler flirted with her I am shocked. Next thing you will tell me is Harvey Levin isn”t 6″ 2″.”