Darci Lynne Farmer, all of 12 years old — and her rabbit — performed on America’s Got Talent last night and it’s the must-see video of the day. As she, or rather Petunia, sang ‘Summertime’ and earned a standing ovation but that wasn’t all. An excited Judge Mel B jumped up and hit the golden buzzer, showering Darci in gold confetti and guaranteeing her a place in the live show.