Kirstin Maldonado has undergone a stunning transformation as part of Pentatonix. After dazzling audiences as a high school trio, the group's membership grew to five, and they exploded in popularity.

Three of the five members of Pentatonix — Kirstin Maldonado, Matt Sallee and Kevin ... Even Maliyah, who is only 4 months old, is showing off some dancing skills. "I'll rap at her a little ...