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ABC's "American Idol" - Season Five

Source: Raymond Liu / Getty

This week was “Disney Week” on ‘American Idol’ and just like years past, Katy Perry went all out in celebration showing up as Ariel from ‘The Little Mermaid.’ She found out the hard way that fins are not easy to maneuver when she took a tumble out of her chair falling to the floor. Host Ryan Seacrest was on stage when his face dropped as he exclaimed “OH!” Through their laughter, co-judges Luke Bryan and Lionel Richie ask if she is okay, and help her back to her seat. Katy shared the embarrassing moment on her Instagram, “Flippin’ your fins you don’t get too far, swipe to see what almost accidentally kidded @lionelrichie.” What is your most embarrassing moment?