Remember how impossible it was to sing along with Eminem's hit single "Rap God" last year because he rapped so fast?

The 2013 hit single is leading Eminem to the Guinness Book of World Records for the most words in a hit single. The rapper said a whopping 1,560 words in six minutes and four seconds, Billboard reported.

During one portion of the song, Eminem was averaging about 6.5 words per second, or 97 words in 15 seconds, according to The Guardian.

"Rap God" sparked controversy when it was released in November 2013 for a verse referencing the 1999 Columbine High School shooting, and for dropping homophobic slurs throughout the song, reported MTV.

Eminem will be joining five other music stars (Metallica, One Direction, Miley Cyrus, Katy Perry and Shakira) in the book of world records that will be published next week, as Billboard revealed.