Question: "Do angels sing?"
Answer: Job 38:7 tells us that during the creation of the world, "the morning stars sang together and all the angels shouted for joy." Revelation 5:11-13 declares, “Then I looked and heard the voice of many angels . . . They encircled the throne and the living creatures and the elders. In a loud voice they sang: ‘Worthy is the Lamb, who was slain, to receive power and wealth and wisdom and strength and honor and glory and praise!’ Then I heard every creature in heaven and on earth and under the earth and on the sea, and all that is in them, singing: ‘To Him who sits on the throne and to the Lamb be praise and honor and glory and power, for ever and ever!’” Luke 2:13-14 informs us, "Suddenly a great company of the heavenly host appeared with the angel, praising God and saying, 'Glory to God in the highest, and on earth peace to men on whom His favor rests.'"
The above Scriptures appear at first glance to give clear evidence to the idea that angels sing. However, in each instance, the words that are translated "sing" or "sang" could also be referring to speaking. At the same time, the fact that the angels are worshipping and praising God seems to argue for singing as the meaning, not just speaking. God has created humanity with an innate connection to music and singing, especially in regard to worship (Ephesians 5:19). It would seem logical that God would have created the angels with that same "propensity" for singing. Whatever the case, whether singing or speaking, we know the angels are all about worshipping and praising God. May we follow their example!