kirstin™ on Instagram: "Three year old Kirstie is living her best life right now - I am SO thankful to absolute tap GODDESS @itsmelindasullivan for helping me dust off and break out my taps and for @im_lindseyb @coloredcraig for really letting me lean into the White Christmas old Hollywood glam and performance style!!!! I love the music and this @ptxofficial show so much and am so proud of all the work put into it by our whole team!!!"

The a cappella quintet Pentatonix has won three Grammy Awards and sold 10 million albums, while their YouTube videos have been streamed more than six billion times. David Pogue talks with group members Kirstin Maldonado, Scott Hoying, Mitch Grassi, Kevin Olusola and Matt Sallee about bringing their heavenly voices to the sounds of Christmas – and about introducing musical instruments to the mix. | CBS Sunday Morning