I just thought of this while listening to some of my favorite ACDC songs. So while our protagonists are in Fastoon, waiting for Clank to get back from checking out the Raritanium mine, Clarice decides to leave Ratchet and Melanie to have an "alone" moment together in an effort to set them up as a couple (I'll explain later) disguised as an excuse for a potty break. Meanwhile, Melanie has her Mp3 out and is rocking out to ACDC (one of her FAVORITES) and then Ratchet get curious about her Mp3 and some of the Earth music she's listening to. Naturally, Melanie lets him have a listen and well, see for yourself. I really think Ratchet would LOVE ACDC, ESPECIALLY "Shoot to Thrill", "Fire Your Guns", "Rock n Roll Ain't Noise Pollution", "Shot Down in Flames", "Skies on Fire" and "War Machine." ^^ Enjoy!
P.S. I forgot to add that he'd also REALLY like Motely Crue! ^^