Micaela McCall busks on State St. in Santa Barbara, the same street that Katy Perry was discovered on during her busking days. Micaela wants more than street singing, and stuns us with a slowed-down version of Stevie Wonder's 'Signed, Sealed, Delivered (I'm Yours)'! Watch 'American Idol' SUNDAYS 8/7c on ABC and Stream on Hulu.