South Korean singer Psy's popular "Gangnam Style" music video became the first video to reach 2 billion views, as it instantly went viral after being posted online in July 2012. "Gangnam Style" has held the most viewed YouTube video for quite some time, also becoming the first video to eclipse the 1 billion-view mark.
Psy's "Gentleman" music video holds the record for most video views in a single day, picking up 38 million in less than 24 hours.
"2 billion views... they are very honorable and very burdensome numbers," Psy said in a statement. "With appreciation, I will come back soon with more joyful contents!"