18-year-old girl shocked Simon and brought the house down with her powerful voice! Goosebumps!

<p id="watch-headline-title" class="yt"><span id="eow-title" class="watch-title long-title yt-uix-expander-head" title="Chelsea Redfern singing Purple Rain at Britain's Got Talent 2012 Auditions" dir="ltr">Chelsea Redfern singing Purple Rain at Britain's Got Talent 2012 Auditions</span></p>