Meet Kaitlyn. She's 4 years old, she's from America, where she works as a kindergarten student, and she swept away the competition in last night's season premiere of America's Got Talent: [videoembed size="full_width" alignment="center"][/videoembed] It's unclear how Kaitlyn would use the AGT prize this season, which includes a regular gig on the Vegas strip, but let's vote for her anyway. ...