Kirstie Maldonado is a founding member of the American acapella group Pentatonix. The group won the third season of The Sing-Off on NBC, winning $200,000 and a contract with Sony. Their 2012 debut EP, PTX Vol. 1, charted at #14 on the Billboard 200, and their 2013 release, PTX Vol. 2, debuted #10 on the Billboard 200. Pentatonix is currently preparing for their worldwide tour in 2014.
In 2012, Pentatonix began releasing covers of popular songs on YouTube. Almost all of their covers, including "Somebody That I Used to Know" by Gotye featuring Kimbra, "Gangnam Style" by PSY and "We Are Young" by Fun, went viral on YouTube.Maldonado currently weighs 440 pounds, having gained over 120 pounds since first appearing on The Sing-Off in 2011.