Instagram video shows the shock on the artist's face when he gets the message of Eminem's arrival in his ear monitors.

Eminem appeared as a surprise guest during Jelly Roll 's set on Sunday night at Ford Field in Detroit, emerging on stage to a deafening crowd to perform the final verse of his 2002 hit "Lose Yourself." Jelly Roll, who has covered the song in the past, began the track solo before the rapper strolled onto stage to help him complete the hit.