Here's proof you don't need bells, whistles or dubstep breakdowns to hit it big in music: Pentatonix have officially topped the Billboard Top 200, and they're the first a cappella group to ever do it. Not a bad way to start the week!

According to the service's sitethe group's self-titled album—their first full-length, non-covers work—bested Demi Lovato's Confident to land at No. 1 on the Billboard 200. Pentatonix moved 88,000 in pure album sales—which stands as the group's best-ever first-week sales—and notched closer to 100,000 with additional media consumption considered.

Confident, Lovato's fifth studio album, settled for second place, and moved 77,000 units in terms of pure album sales (98,000 with additional media). Her last No. 1 debut came from 2009's Here We Go Again, but each of her works has kicked off from within Billboard's top five.

"WE LANDED THE #1 SPOT! I cannot BELIEVE it! Thank you to everyone who bought the album!!" member Mitch Grassi tweeted after the news broke.

Last week, Grassi told PEOPLE a No. 1 debut would mean the world to Pentatonix, and that it could merit some serious celebrating.

"I think it would really put us on the map as an actual pop music act," he said, and added there would be "lots of screaming, lots of dancing and probably lots of bottle-popping" with a top-spot debut.

Did you grab a copy of Pentatonix's history-making album? Whaddya think?

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