Here's the link to the song Popular from the musical "Wicked"
At 1:47 Galinda sings
...Instead of dreary who-you-were... are.
There's nothing that can stop you
From becoming popu-ler...- lar
And the audience is laughing after that -ler/-lar endings.
So could you please tell me is what's so funny about that? )))
Thanks everyone who'll answer!