Greek underworld his duty was to bring these souls to the underworld and no one would persuade him to do otherwise. Cerberus (Kerberos), or the "Hell-Hound", is Hades' massive multi-headed (usually three-headed) dog with some descriptions stating that it also has a snake-headed tail and snake heads on its back and as its mane. Born from Echidna and Typhon, Cerberus guards the gate that serves as the entrance of the underworld. Cerberus' duty is to prevent dead people from leaving the underworld. Heracles once borrowed Cerberus as the final part of the Labours of Heracles. Orpheus once soothed it to sleep with
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