Since their emergence in 2011, Pentatonix has become one of most innovative vocal groups of all time and redefined what a cappella is all about.

The three-time Grammy winning vocal quintet, which features Scott Hoying, Mitch Grassi, Kirstin Maldonado, Kevin Olusola and Matt Sallee, have sold more than 10 million albums and performed everywhere from The White House to The Hollywood Bowl. Last year the group completed their biggest Christmas tour to date by selling more than 200,000 tickets in support of their Greatest Christmas Hits album.

This weekend, the group is bringing its ubiquitous vocal talent and high energy to the Allentown Fair for a performance on Saturday, with special guest and “American Idol” alum David Archuleta. It’s a show that promises both a healthy dose of classic Pentatonix material as well as new songs along with a few surprises.

I recently spoke with vocalist Kirstin Maldonado about Pentatonix’s Allentown Fair show and more in this new interview.

Q. What can Pentatonix fans expect from your Allentown Fair performance?

Kirstin Maldonado: We’re really looking forward to the show. It will be fun and different. Last year we were touring constantly and this year we had a lot had time off to be able to work on new music and we’re also bringing back some oldies and classics. We always try to include the songs everyone wants to hear.

You can read the rest of my Morning Call interview with Kristin Maldonado by Clicking Here.