My best friend Lloyd and I had the perfect plan. We started a blog to invite aliens to come to Earth and hang out-but only with us. Two aliens showed up one night. The problem is, they're total buttheads! Literally. They have butts on their heads, and they talk in farts. They're rude, disgusting, and they love Earth so much, they just invited 70 billion of their friends to join them here. Oops. Now it's up to us-two sixth graders with B-pluses in science - to save the planet from the sickest extraterrestrials in the universe (preferably without my parents finding out).