 John Eskow of "The Huffington Post" named Aguilera a main proponent for "oversouling", described as the "gratuitous and confected melisma".Lucy Davies, a writer for BBC Music, opined that although Aguilera had "a stunning voice", she "could be more varied, simply by cutting out some of the 'y-e-e-eeeh, woah yeh's'".Longtime producer Linda Perry, who wrote the song "Beautiful", revealed about the recording sessions with Aguilera, "I tried to keep it straight.