It’s not just a song that was a hit in the 90’s. It’s practically everywhere you go. You read it; you pause and either you smile, snort, chuckle or laugh. Some of these signs border on the naivete; some just want to tickle your funny bone; others are serious, sarcastic, or just plainly trying to get the message across yet end up becoming epic failures. See if you’ve come across any of these 25 most ironic signs in the world.