By Brandy McDonnellA version of this story appears in Friday's Weekend Life section of The Oklahoman. Summer singHit-making vocal group Pentatonix returns to OKC on amphitheater tourFor Kirstin Maldonado, nothing tops a snow cone when it comes to beating the summer heat or indulging in a scoop of college-days nostalgia.“I love snow cones,” Maldonado said with a laugh.Read more on NewsOK.com