The 16-year-old singer impressed with her performances of Aerosmith's 'I Don't Want to Miss a Thing', Mariah Carey's 'My All' and Jackson 5's 'I'll Be There', pulling in a whopping 55.4% of the vote.
Coming in second was Phillip Phillips, who earned 29.6% for his renditions of Matchbox 20's 'Disease', Madcon's 'Beggin'' and Bob Seger's 'We've Got Tonight', the latter of which judge Randy Jackson deemed his best performance of the season.
Finally, in last place was Joshua Ledet. Despite high praise from the panel, he received only 15% for his takes on Mary J Blige's 'No More Drama', John Lennon's 'Imagine' and Etta James's 'I'd Rather Go Blind'.
American Idol extended its lead over rival shows airing Wednesday night, picking up an audience of 17.3m.
Which two singers will make it through to next week's American Idol finale? Join Digital Spy live from 8/7c to find out!