Peter Hollens is an a cappella artist, and he's is amazing. He's a lot like Pentatonix but he collaborates a lot more in his music.

10. "Les Miserables Medley" -- Peter Hollens feat. Evynne Hollens

The amount of work that Peter and Evynne put into this is amazing.

9. "Hallelujah" feat. Jackie Evancho

First off, props to Jackie Evancho for her amazing work. Peter astounds me with the amount of talent he has in this song.

8. "The Hanging Tree" -- Peter Hollens

I absolutely love how he can take this song and make it relevant to those who may have never read the "Hunger Games" series or have heard Jennifer Lawrence's version of this song.

7. "The Ed Sheeran Mega Medley" -- Sam Tsui and Peter Hollens

This mega medley is definitely mega. The amount of talent in that video is endless as Sam Tsui is an up and coming independent artist.

6. "Epic Goofy Medley" -- Peter Hollens & Stuart Edge

This song allows us to see a goofier side of Peter, and the video is just so much fun!

5. "1989 in 4 Minutes" -- Peter Hollens ft. Evynne Hollens

This medley is amazing because of the way that he trades off songs with his wife.

4. "Prince of Egypt Medley" -- Peter Hollens

"The Prince of Egypt Medley" is a wonderful medley. It shows the arrangement skills that he has and how well he can pull everything off. It is also a medley he does without his wife.

3. "Black Is the Color of My True Love’s Hair" -- Peter Hollens & Avi Kaplan

I love that he's so keen on working with Avi Kaplan (who is a known beatboxer and bass for Pentatonix but is also a solo artist). He shows that he fits right into the acapella genre with this song.

3. "The Prayer" -- Peter Hollens ft. Evynne Hollens

In "The Prayer," which is a tribute to his late father, Peter shows yet another talent he has which is beatboxing. He also shows that he can speak Italian through this song.

2. "What Are Words" -- ThePianoGuys, Peter Hollens & Eveynne Hollens

I love that he can take a song and make it so beautiful with some help from his wife, Evynne, and ThePianoGuys. The piano and his wife's lovely voice makes this number two on the list.

1. "Ashland’s Song" -- Peter Hollens

I saved the best for last with "Ashland's Song." Ashland is his son, and Hollens tried to capture the ride of being a father with this song. If you aren't at least tearing up at the end of this song, I don't know if you're human or not.