Q: Passage: Heavy metal artist Ozzy Osbourne sings the show's theme song, "Dog the Bounty Hunter". The song can be heard on Osbourne's Prince of Darkness box set. Many episodes feature at least one song from a band that is either unsigned or with an independent label, usually played during an action scene. These songs are plugged at the end of each episode, following the closing credits. Several episodes in season three and four have music from New York City-based dub reggae group Subatomic Sound System's On All Frequencies album. Featured songs include: "Criminal", "Doin' It", and "Ghetto Champion". Soulja Boy's music video for "Yahhh!" includes an impersonation of "Dog Woof Woof"

Question: Based on this passage, who sings the theme song to dog bounty hunter? Let's give stream of consciousness first:
The important part for answering this question is: Heavy metal artist Ozzy Osbourne sings the show's theme song, "Dog the Bounty Hunter". Therefore, the final answer is Heavy metal artist Ozzy Osbourne.