Kirstie Maldonado has one million to celebrate…

The 22-year-old half-Mexican/part-Spanish singer and her Pentatonix band mates’ holiday album That’s Christmas To Me has surpassed 1 million in total sales in the week ending December 21.

With another 203,000 sold, its cumulative total now stands at 1.02 million, landing Pentatonix in special company.

That’s Christmas To Me, released through RCA Records, is only the fourth album to sell a million copies in the U.S. in 2014, following the Frozen soundtrack (3.46 million), Taylor Swift’s 1989 (3.34 million) and Sam Smith’s In the Lonely Hour (1.13 million).

That’s Christmas To Me continues to be the a cappella group’s best selling studio effort, well ahead of PTXmas, which has moved 356,000.

Additionally, That’s Christmas To Me is the first holiday album to sell a million copies in a calendar year since 2011, when both Michael Buble’s Christmas and Justin Bieber’s Under the Mistletoe managed the feat (with 2.45 million and 1.25 million, respectively).