Pluto (mythology) designed a set with a rotating mountain that opened up to reveal Pluto emerging from the underworld; the drawing survives and was the basis for a modern recreation. The tragic descent of the hero-musician Orpheus to the underworld to retrieve his bride, and his performance at the court of Pluto and Proserpina, offered compelling material for librettists and composers of opera (see List of Orphean operas) and ballet. Pluto also appears in works based on other classical myths of the underworld. As a singing role, Pluto is almost always written for a bass voice, with the low vocal range representing
What the Hell it encompasses the pop-rock sound Avril has been creating over the years". McDaid goes on to say that it is "definitely a song that reflects the older, more fun loving Avril Lavigne." Holly Thomas of "Frost Magazine" believed that the song lacked maturity and described it as "irritating", but she praised the song for its lyrics and theme. Kirsten Coachman of Blogcritics simply said that people could easily relate to it. McDaid and Thomas all agreed that some might find the song annoying. Jonathan Keefe from Slant Magazine was more positive: "Martin ensures that lead single "What the Hell" explodes