David Cross is not billed under his real name in the end credits but instead as Sir Willups Brightslymoore.
During the credits there is a sequence showing Bumper performing "All of Me" on "The Voice". All four mentors spin their chairs and Bumper ultimately chooses Christina Aguilera, a selection she soon regrets.
As with the first film in the series, the usual Universal logo fanfare is replaced with one sung a cappella , this time by the performance commentators John and Gail, as is disclosed when the screen cuts to the opening scene.
In the end credits sequence with Bumper auditioning for "The Voice", Blake Shelton is the first to turn his chair, which drives Bumper to amp up his performance to over-the-top. This causes Blake to turn his chair back around. This isn't a normal function, the chair was specifically modified for this joke in the film.