"Guestbook" by Ratbag Hero is a good little metasong. Ratbag Hero was a fantastic, silly Chicago punk band who sang a lot about beer drinking, partying, and girls. this song is about someone posting in their internet guestbook telling them that they can't write another love song, or another song about beer. of course, actually following such advice would be bad, because that's really all Ratbag Hero wrote about...so they wrote a song about how confused they were that those two topics were verboten. it's clever, it's hilarious, and it's Ratbag Hero.