A Random

SCIFI.radio story

Earth enters a parallel dimension where everything is backwards except Mxyzptlk who are friendly but incomprehensible even though they can all do credible singing impressions of Ethel Merman and might be overpowered by a crowd of people with pitchforks and torches but one cunning young man somehow convinces them that people are okay and they form a rock band and tour the galaxy, becoming interstellar celebrities.
The End.