14-Year-Old Singer Courtney Hadwin Wows Audience With Powerful Rendition Of 'River Deep Mountain High' 'America’s Got Talent' teen contestant Courtney Hadwin wowed everyone with her amazing performance of a Tina Turner hit song. She garnered positive comments from judges Howie Mandel, Heidi Klum, Simon Cowell, and Mel B. by MJ de Castro