During the Credits
There is an extra scene during the credits of Casa de mi Padre showing Armando (Will Ferrell) and Sonia (Génesis Rodríguez) singing a duet together, followed briefly by a fake plug for a record of the song.
After the Credits
There is also a Haggerty Smokes commercial with Dan Haggerty after the credits of Casa de mi Padre.
Special thanks to Brandon Martin for the stinger submission!