You might recognize Eminem's refrain. It is the hook of Queen's 1978 hit "Bicycle Race
." Grey told Rolling Stone
: "That was an Eminem move. The first time I heard his verse, he had added that part in as well and it made me laugh, so we kept it."
Grey went on to explain why she opted to keep Eminem's vocals rather than sampling Freddie Mercury's originals. "I love hearing Marshall change his voice like that and just, like, be a character, play a character, so I thought that was funnier, personally," she said.