A Random

SCIFI.radio story

Earth receives a visit from future selves with warnings of impending doom who are friendly but incomprehensible even though they can all do credible singing impressions of Ethel Merman and might be overpowered by the army, navy, air force, space force and/or marines 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.