EminemEminem share the stage at the Ford Field performance

 private performance Friday night at the Royal Oak Music Theatre,

Sheeran invited Eminem onstage for a surprise two-song set,

during his Ford Field concert on Saturday night.

While performing "Lose Yourself," Sheeran was already halfway through,

when a hoodie-clad Eminem appeared and joined him.

He picked up Sheeran's vocals and startled the audience.

Fans heard rumours about Eminem's impending entrance all day long before the concert.

Sheeran contributed to the rapper's songs "River" from 2017 and "2020."