Two people singing at the same time, you twit.
Duet
It is called a DuetDuet
A duet
"The enchanting music of the piano duet drifted over the lawn and across the garden."
Couple - ( in music, duet)
A duet
A duet.
Madonna.
That's called a duet.
Not live, but if you use recording equipment and over dubbing yes, effectively the music produced will sound like a duet.
When two people play the same song together.
feat means "featuring." it was just like duet.