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 was "starved of affection from the one she truly loves." Lavigne described the song as "more reminiscent of some of my old pop rock stuff", calling it her "most pop track on the record" and the least personal song from the album. "What the Hell" has received positive reviews from music critics, who have noted similarities between "What the Hell" and Lavigne's previous single, "Girlfriend". Gil Kaufman of MTV.com stated "What the Hell" has "rousing cheerleader energy" and an "infectious groove and peppy vibe". Jody Rosen of "Rolling Stone" magazine said "the music is easily some of Avril's catchiest yet",