1) Belted out 2) Belted out notes 3) Crooned 4) Delivered in parts 5) Did choral work 6) Done by a choir 7) Done vocals 8) Emulated Whitney Houston 9) Has done choral work 10) Has put words to music 11) Like a chorus line 12) Like a madrigal 13) Like anthems 14) Like arias 15) Like arias and anthems Found on https://www.crosswordclues.com/clue/sung
Sung is to be relaxed. Relaxation of the body in motion leads to speed and naturalness. However, Sung is not limp and dead. Found on http://www.encyclo.co.uk/local/21434