Lily Allen Goes Balls Out

2/3/2009 4:15 AM PST BY TMZ STAFF
... as in, snowballs.

lily Allen: Click to watch
Lily Allen and her buds started an all-out war with the paps in the streets of London today -- and girl's got killer aim, check her out pelting out photog square in the lens!

From there, Allen and Co. went sledding, with Lily riding her assistant for a sled. We doubt that was part of the job description ...