Their knees. (Not sure if this one translates well to english)
Oh wait thats Nicki Minaj. Why would an alien in a wig pick Nicki Minaj as a name
Because everyone wishes him a new ear.
They're both Marine layers
A Lickalottapus
It's knees.
Britney Spears
Because the corn have ears, the potatos have eyes and the beanstalk.
Anything you want as he can't hear you!
Smiles - because there is a mile between the first and last letters
The English cat. Un deux trois cat sank.
Because he higher and higher. (I translated the joke from Dutch, and yeah it's supposed to not make any sense, it just sounds funny, in Dutch at least. :-$)
Translate.