Watch: Britney Spears Takes on the Jackass ‘Porta-Potty Bungee’

Spears

Remember the porta-potty bungee from the Jackass movies? On last night's Jimmy Kimmel, Britney Spears took up an offer from Jimmy's other guest, Johnny Knoxville. 

Watch, AFTER THE JUMP...

It'd be much more entertaining if she hadn't used a stunt double.