A capella barged into Hollywood scene and the rest of the world with its melodic music when Nota became the first of five "The Sing-Off" winners. The surprise hit movie, "Pitch Perfect," also solidified the world's appreciation of the genre even more.

NBC revived the unique singing competition this Christmas season. Instead of giving its avid viewers the usual full season of a capella offering, the network decided to drastically cut the show down to only a two-hour special.

Despite the limited time, it did not stop the six groups from giving their best to earn the top prize. By the end of the night, host Nick Lachey announced the all-male collegiate group The Melodores as the fifth member in the list of "The Sing-Off" winners.

However, before The Melodores wowed the viewers with their awesome performance of Hozier's "Take Me To Church," four other groups previously claimed the title of champion on the show.

First off, we have season one's classic a capella group, Nota. Consisting of six Latinos, one of their best performances was arguably Jay Sean's "Down." Although Bustle only ranked them third in their list of best "The Sing-Off" group, Nota still helped define how America and the world saw a capella.

The second season brought us the gospel-loving boys of Committed. They were ranked fourth in Bustle's list.

Pentatonix impressed both judges and viewers alike by incorporating electro-pop music to their performances. Aside from Bustle recognizing them as the best amongst "The Sing-Off" winners, they will also be appearing on "Pitch Perfect 2" as one of the Barden Bellas' formidable rivals.

The fourth champion is the country group Home Free, whose bass voice is as powerful as their main vocalists. They took the show to a whole new level with their own version of Johnny Cash's "Ring Of Fire."

And last but not the least is the newest addition to "The Sing-Off" winners: The Melodores. Who do you think was the best amongst the champions? Would you want "The Sing-Off" to come back next year?