Taylor Swift's "Blank Space" YouTube video has passed Justin Bieber's "Baby" in views, making it the No. 2 most-watched of all time.
The No. 1 YouTube video has been Psy's "Gangnam Style."
As of Sunday, Oct. 25, 2015, "Blank Space" had been viewed about 4 million more times than "Baby," but both have been viewed more than 1.2 billion times.
"Gangnam Style" has been watched more than 2.4 billion times. The video on the "OfficialPsy" YouTube page had been viewed so many times it could no longer display a count number that includes commas, forcing YouTube to upgrade.
"We never thought a video would be watched in numbers greater than a 32-bit integer (=2,147,483,647 views), but that was before we met PSY," a post on YouTube's Google Plus page said in December 2014.