I love to sing. (Though you will rarely find me singing now)
When I was in 8th grade I took choir class in junior high school.
Found out I wasn't as good I as I wished for.
Couldn't read music well, could not sing a note on request.
And so I copied the person next to me.
I became an expert at listening to the person to my right and immediately matching their pitch. I believed no one noticed... at least no one said anything.
It was the best I could do. By being a fast imitator and keeping up, I passed the class.
--- Which could be referred to as mimic, copycat, impersonator, parodist, pretend, fake, simulate, replicate or duplicate. Most of which are not words to be proud of.