What a laugh!

Hi all, sorry again for not posting much! I really have been quite busy...

Just thought I'd share with you all some very funny jokes:

Knock knock?
(Who's there?)
Alpaca
(Alpaca who?)
Alpaca trunk you-pac-a suitcase!

Knock knock?
(who's there?)
Britney Spears
(Britney Spears who?)
Britney Spears
(Britney Spears who?)
Oops I did it again!

My friends and I were literally in a laughing fit the whole of breaktime over those. Not that funny I know, but we just couldn't help it! Oh God, I'm laughing now just thinking about it! Haha...