Dictionaut, no. 4

Another in a series of unknown length, on an irregular schedule, of indeterminate usefulness.

Melismiasma

A phenomenon during which a singer—often performing a cover of a beloved classic—gets lost in warbling ululations and pointless technical displays instead of rendering a listenable song.

Example:
“Say a Little Prayer,” from Sing 2
Many, many, many soloists in church choirs