“What’s Up Bitches?” is a song released by the Epic Rap Battles of History crew in commemoration of obtaining 6 Million Subscribers on their YouTube channel. It was released on YouTube on June 17, 2013, during the break between Seasons 2 and 3, as “6 Million Subscribers. Thank You.” then made available for purchase and streaming via iTunes and other services.

The song is a remix of previous installments of the “ERB News” segments. They are released in between episodes and seasons with news updates on production. Each one is opened with the catchphrase “What’s Up Bitches?” The remix was a concept and production of the viral video champion Gregory Brothers, who “Songify” the internet. Various animals and historic figures such as Theodore Roosevelt, Adam Smith, Ben Franklin, Charles Darwin, and Isaac Newton, voiced by NicePeter as well in previous segments, are all edited and imposed together throughout the video, and there is no actual live action.

At the end of the video, an interlude is included with Darwin saying:

6 Millions Subscribers. Woo, Thank you. It is an honor making these videos for you and with your support we hope to continue to evolve.

Followed by Roosevelt:

This video was created and sent to us by our dear friends the Gregory Brothers, subscribe to their “Channel Schmoyoho”, Accent on the ‘YO’…So, do it! Oh!

The ERB team, gaining over 14 Million Subscribers as of February 2017, released the song for purchase along with other Epic Rap Battles and accompanying merchandise, such as this Roosevelt “Bitches” tee.