Nikki from Chicago, IlMiri Ben-Ari, the Hip-Hop Violinist and Tarrey Torae, one half of the duo "J. Torae" are special guests on this song. Tarrey Torae's husband, J. Ivy (who is the other half of J. Torae) gave John Stephens the name "John Legend" because he has a style like the legends of old such as: Stevie Wonder, Sam Cooke and Donnie Hathaway. J. Ivy is also a poet best known for being on Def Poetry Jam and on Kanye West's first album "The College Dropout".
Meghan Trainor and her producer Kevin Kadish originally wrote "All About That Bass" for another artist to record. However, after Epic Records boss LA Reid heard Meghan play a demo of the song on a ukulele, he signed the young songwriter to his label and told her she should sing it.
Bruce Springsteen wrote "Blinded By The Light," which was a #1 hit for Manfred Mann's Earth Band. The "Madman Drummers" line is a reference to Springsteen's first E-Street drummer, Vinnie "Mad dog" Lopez.