Since this is two weeks old... I'll assume you've shot the video.
There are some DJ apps that have cue points like DJ Player (~$50)
https://itunes.apple.com/app/dj-player/id339810085?mt=8
Or Red Bull BMP (free, and seems like a branded clone of DJ Player)
https://itunes.apple.com/us/app/red-bull-bpm-dj/id471259274?mt=8
I strongly prefer cutting the track before getting on set and creating different tracks. I will add a 4 second count down at the beginning so I'll have tracks like: full song, intro, verse 1, chorus 1, and so on. The lead-in beeps also assist with sound sync in post.
Angelo Lorenzo
Fallen Empire Digital Production Services - Los Angeles
RED transcoding, on-set DIT, and RED Epic rental services
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