Fifth Harmony's name was no accident. The girls have some serious pipes, and their harmonies are on point. They managed to turn Ed Sheeran's soft ballad 'Lego House' into a soulful piano ballad, while still maintaining the melancholy yearning that the original song conveys.

The 'X Factor' finalists take turns with their solos, injecting "Oooohs" and teaming up for the choruses. It's a beautifully done rendition -- no wonder they still got signed! The cover was so popular that "5HLegoHouse" was a trending topic on Twitter. Good job, ladies!