In many areas of Paris you will find "street artists", but especially in Montmartre! Monmartre is known as an artists' community and you'll have plenty of opportunities to have a painting done of you or buy some artwork. Monmartre is well worth visiting as it has a unique atmosphere compared to the rest of Paris.
When I arrived to visit the Sacre Coeur I was surprised to find a lot of policeman and crowds of people. After enquiring, I found out that the Stations of the Cross was about to take place. This entails people singing hymns walking, kneeling and praying their way up the stairs into the church.