Do angels sing?
"Then the Lord answered Job out of the whirlwind and said: 'Who is this who darkens counsel By words without knowledge? Now prepare yourself like a man: I will question you, and you shall answer Me. Where were you when I laid the foundations of the earth? Tell Me, if you have understanding. Who determined its measurements? Surely you know! Or who stretched the line upon it? To what were its foundations fastened? Or who laid its cornerstone, When the morning stars sang together, and all the sons of God shouted for joy?' Job 38:1-7 NAS
The word "stars" is Strong's #3556 and one of its definitions is "heavenly power (that serve God)." Thus, a star could be an angel. Both my commentaries: Jamieson, Fausset, Brown and Matthew Henry, state that "morning stars" as used in this verse are indeed angels. Also, we can regard Rev. 1:20 where Jesus tells John "The seven stars are the angels of the seven churches . . . "
And they sang in a mighty chorus:
"The Lamb is worthy--the Lamb who was killed.
He is worthy to receive power and riches
and wisdom and strength
and honor and glory and blessing."
New Living Translation © 1996 Tyndale Charitable Trust
“Then I looked and heard the voice of many angels, numbering thousands upon thousands, and ten thousand times ten thousand. 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!” Revelation 5:11-13.
The Greek word could mean saying or singing… in context since the verses before have similar words sung by the twenty four elders it is best translated sung.
“And when he had taken the book, the four beasts and four [and] twenty elders fell down before the Lamb, having every one of them harps, and golden vials full of odours, which are the prayers of saints. And they sung a new song, saying, Thou art worthy to take the book, and to open the seals thereof: for thou wast slain, and hast redeemed us to God by thy blood out of every kindred, and tongue, and people, and nation; And hast made us unto our God kings and priests: and we shall reign on the earth.” Revelation 5:8-10.
"Yes, angels do sing."