The world has fallen in love with Pentatonix since day one. If you're like me, you aren't just in love with Pentatonix, you're addicted to Pentatonix. For those of you who don't know who Pentatonix is, I ask you, how? And for those of you who don't like Pentatonix. I ask you, why? There too many memorable moments that Pentatonix has had to name, but here are some of the best and most important.

1. The trio.

For those of you who don't know this, Pentatonix wasn't always a five-person group. They started out as a trio in high school, and that trio included the members Scott, Mitch and Kirstie.

2. "The Sing-Off."

Pentatonix became complete when they decided to go on the television show competition, "The Sing-Off." The group added two new members, Kevin and Avi, and together they created perfection.

3. Their first YouTube video.

After winning "The Sing-Off," the group was dropped by their label. But they didn't let that stop them! They began uploading videos of them singing their versions of popular songs to begin a new era of Pentatonix.

4. Their first music video.

The very first music video that they professionally made was for their song "Daft Punk." It was hit and instantly reached thousands of views!

5. Their first Grammy.

Pentatonix won their first Grammy for their Christmas album, "That's Christmas to Me," and nobody deserves it as much as they did!

6. The documentary.

Their third tour was called the On My Way Home Tour. During the tour, they filmed a documentary, which basically showed how their lives were like while on on the road.

7. The original song album.

Their most recent album includes many original songs. It was a hit, and one of the most popular and best albums they've ever recorded. It led to many more music videos that had millions of views.

8. Their SECOND Grammy.

While many believed that Pentatonix would only win one Grammy, they once again proved the world wrong by winning another for the song "Dance of the Sugar Plum Fairies," which appeared on their Christmas album.

9. Their current tour.

The group is currently on a worldwide tour. They've done incredible things with this tour, and it's the best one that they've ever done!

10. The television performance.

Kirstie, Mitch and Scott were recently on the television show "Bones." Kirstie sang her own song and Scott and Mitch sang a duet.

There are many memorable moments that Pentatonix have had, but too many to name! So, if you aren't convinced after this article that Pentatonix is perfection, you should change your opinion and become obsessed. I promise you, you won't regret it.