The musical relationship

After watching a little girl drum up quite a bit of support, I have concluded that there exists an inverse relationship between the innate cuteness of a street musician and how talented they need to be.

Ought to be able to hold a violin, more or less unaided.

Should be able to play pretty well.

Must be incredible.

Although there would then be a lower bound, below which musical talent is no longer particularly necessary.

May benefit from an ability to hold eye contact.