"Make That Infant Smile" is the song Stan uses in attempt to Cheer up Avery in "Avery. B Jealous" The song didn't work, but it is hinted that Stan has performed this song before, since he said. "C'mon, you always smile at the jazz paws!"
I'm your furry fun technician
Here to fix your disposition
Pouting can be infantile
Time to make that infant smile!