In what could provide the most enjoyable year-in-review experience around, YouTube has just announced their Rewind 2011, a trip down memory lane, feature everyone’s favorite (and possibly least-favorite) videos of the year.

You could say that it was a pretty big year for YouTube. In a blog post, they announced over 1 trillion (1,000,000,000,000 for effect) playbacks on the site as a whole. That’s around 140 playbacks for every person on planet Earth.

“To compile these lists, we looked at global view counts of popular videos uploaded throughout this year, and, in some instances, we aggregated views across multiple versions of the same video.”

Here’s what they came up with, the top ten videos of the year (in order)

1. Rebecca Black- “Friday”

2. Ultimate Dog Tease

3. Jack Sparrow (feat. Michael Bolton)

4. Talking Twin Babies (pt. 2)

5. Nyan Cat

6. Look At Me Now – Cover by @KarminMusic

7. The Creep (feat. Nicki Minaj & John Waters) (Hulu embed)

8. Maria Aragon – Born This Way Cover

9. The Force – Volkswagen Commercial

10. Cat mom hugs her baby kitten

Here’s their list for most viewed videos from major record labels:

Jennifer Lopez – On The Floor ft. Pitbull
LMFAO – Party Rock Anthem ft. Lauren Bennett, GoonRock
Bruno Mars – The Lazy Song [Official Video]
Nicki Minaj – Super Bass
Pitbull – Give Me Everything ft. Ne-Yo, Afrojack, Nayer
Pitbull – Rain Over Me ft. Marc Anthony
Jessie J – Price Tag ft. B.o.B.
LMFAO – Sexy and I Know It
Katy Perry – E.T. ft. Kanye West
Katy Perry – Last Friday Night (T.G.I.F.)

Over at the blog post, YouTube also links to playlists where you can find the most popular videos in specific categories like sports, travel, food, science and fashion.

For instance, here’s the most watched video of the year in the “sports” category:

The YouTube Rewind page features more year-end lists like “fastest rising search terms” organized by month, and a place to vote for the best videos of the year.

What was your favorite YouTube video of 2011? Let us know in the comments.