Playing To A Massive Crowd With Guest Musician

I am on stage playing with my band

A guest musician comes up on stage and plays a cover of one of my songs

He feels to me like a famous musician. Someone who plays a similar style of music to Bruno Mars

I come out and join him. We play the rest of the song together with the whole band

There are allot of people in the crowd. I can't see them through the lights from the stage. But the stage is massive and the noise of the crowd is at least 10s of thousands of people

I have flashes throughout this sequence of other times within my music career, playing on stage