If you have gone through the Underground, you probably have seen one of them.
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Lots of people are using public transport every day to go to different places of the city, going to work or going to visit monuments. It's important to realise how many singers there are on the streets, and we don't even pay attention to them.
They are not commercial artists; they just want to share their ideas and entertain the travellers, because music always puts a smile on our faces.
They spend hours and hours playing their guitars and singing their songs. This is of great worth to them as they don't have a studio to record in.
There are lots of underground singer videos online of artists trying to promote themselves.
These stars have found a new place to promote amazing music.
Furthermore, American stars began to pop up on public transport.

Good luck with new projects for the beginners!