OMSC 21

Online Music Song Contest 21, often referred to as OMSC 21, was the twenty-first edition of Online Music Song Contest, held in Yerevan, after Armenia won the previous edition of the contest.

The Pre-Qualification Round of OMSC 21 occured on the 5ᵗʰ December 2021, the Semi-Finals on the 12ᵗʰ December 2021 while the Final occured on the 12ᵗʰ December 2021. Fifty countries participated in the twenty-first contest, under the slogan “Embrace Unity!”.

Location
After it's victory in the previous edition, the broadcaster ARMTV chose to host the contest in in the capital and most populous city of Armenia, Yerevan, which has a population of over 1,000,000 inhabitants.

Participants
Fifty countries participated in the twenty-first edition of the contest: fifteen European countries (Belarus, Bulgaria, Cyprus, Estonia, France, Germany, Italy, Liechtenstein, Luxembourg, Moldova, Norway, Poland, Romania, San Marino, Ukraine), fifteen Asian countries (Armenia, China, India, Indonesia, Iran, Israel, Kazakhstan, Kyrgyzstan, Malaysia, North Korea, Palestine, Philippines, South Korea, Thailand, Turkmenistan), seven American countries (Argentina, Brazil, Canada, Colombia, Curaçao, Mexico, United States of America), eight Oceanian countries (American Samoa, Australia, Cocos Islands, Guam, Kiribati, Marshall Islands, New Zealand, Palau) and five African countries (Cape Verde, Equatorial Guinea, Ethiopia, Mayotte, Réunion).

In this edition Equatorial Guinea and Mayotte participated for the first time.

Returning Artists
This edition featured three representatives who had performed previously as lead vocalists for a country in the contest.

Rosé Boom Boom Cash CXLOE

Withdrawing Countries
These countries confirmed their non-participation in the twenty-first edition of the contest: