'Gangnam Style' is YouTube's Top Trending Video of 2012

What were you watching in 2012? No need to rack your brain because YouTube has the answer: It's Gangnam Style

The addictive dance hit by South Korean singing sensation Psy was the video-sharing site's top trending video this year.

"Korean Pop music transcended boundaries and took the world by storm. Cover songs, parodies and 'do-it-yourself' music videos from all genres entertained us in countries near and far," YouTube wrote in a blog post Monday.

Check out the remaining top 10 trending YouTube videos of 2012, listed below:

• 2. "Somebody That I Used to Know - Walk off the Earth (Gotye - Cover)"
• 3. "KONY 2012"
• 4. "'Call Me Maybe' by Carly Rae Jepsen - Feat. Justin Bieber, Selena, Ashley Tisdale & MORE!"
• 5. "Barack Obama vs Mitt Romney. Epic Rap Battles Of History Season 2."
• 6. "A DRAMATIC SURPRISE ON A QUIET SQUARE"
• 7. "WHY YOU ASKING ALL THEM QUESTIONS? .. #FCHW"
• 8. "Dubstep Violin- Lindsey Stirling- Crystallize"
• 9. "Facebook Parenting: For the troubled teen."
• 10. "Felix Baumgartner's supersonic freefall from 128k' - Mission Highlights"

To mark this year's viral-video success, the site created a mashup of "culturally defining moments of 2012," featuring NASA's Mars rover landing, Carly Rae Jepsen's "Call Me Maybe" and, of course, "Gangnam Style." Dubbed "Rewind YouTube Style 2012," the fun video boasts appearances by some of your favorite YouTube stars -- including Psy himself.