Goat and a Pig" is a song in "  The Love God." During the song, a photo montage of Waddles and Gompers' "wedding day" is shown.
Lyrics Goat and a pig
A couple of livestock, livin' the life, stuck together in harmony
A pig and a goat, showing the world that a pig and a goat can be family
Love so strong, love so big, such a beautiful
Goat and a pig
Bound in matrimony now and forever
Shopping for groceries and buying a condo and filing their taxes together
Goat and a pig, goooooat and a pig!
It's partly a parody of " This Will Be" by Natalie Cole.
 Neil Cicierega, the composer and writer of the song, put up the original version of the song online.
Breeck, Brad (May 25, 2015). Tweet Number 603033524581441536. Retrieved on May 26, 2015. “@TheD00MSong the great @robbiewyckoff San Goat and a Pig!”
↑ Cicierega, Neil (November 26, 2014).
Tweet Number 537726039938445312. Retrieved on November 28, 2014. “if you watch Gravity Falls tonight on Disney XD, the episode ends with a song I wrote! And @EmmyCic worked on the storyboards! Wow!” ↑
3.0 3.1 Cicierega, Neil (November 30, 2014).
Tumblr post ID 103685262408. Retrieved on May 18, 2015. ↑ 4.0 4.1 Cicierega, Neil (November 26, 2014).
Tumblr post ID 103685242673. Retrieved on May 18, 2015.