timer

Hello guys,  first of all, thank you for this amazing app, love it so much.  

I have a suggestion, why don't you guys put a timer for songs 5s, 10s, 15s. For example,  when i wanna shoot a snapchat video, and want to make an entrance dance, there is no way for me to start the song and do the dance at the same time which is kinda annoying. 

Thanks,