Because the guys singing is strange and awkward. They are singing nicely then when he chimes in it is not so good.
The people that are singing Christmas song in the street, are called Christmas Carolers.
Carolers.
Carolers are a group of people who usually go door to door to sing songs. They usually go around singing songs of praise or joy. You'll likely see carolers out during the winter near Christmas singing Christmas songs.
The Merry Christmas song was first sung and performed in the 16th century in England. It was traditionally sung on Christmas Eve as carolers were out and about singing.
Christmas carolers often enjoy singing songs such as Silver Bells, Silent Night, Deck the Halls, Frosty the Snowman, Holly Jolly Christmas, and Jingle Bells.
In the Western countries, people go in groups from door to door and sing songs on your front door step on Christmas Eve. These people are called Christmas Carolers
"Stars" by The Weepies.
Nataly Dawn
Cee Lo Green
No, it is the present participle of "to sing" and may be a verb, noun (gerund), or adjective (e.g. singing carolers).
Miss KY USA 2011 Kia Hampton
Like many other Christmas traditions, caroling is also thought to have its roots in the pre-Christian celebration of the Festival of Yule, when Northern Europeans would come together to sing and dance to honor the Winter Solstice.