Will updating my iPhone delete everything?

I have a iPhone 4S, the iOS 6 came out today, I've never updated my iPhone so will updating it delete everything? Pictures? If it does i'll honestly die.
If it doesn't, how do i go about installing it? Do i have to use my laptop?

Backup 1st! No -updating an OS should not delete data. Always backup anyway. You can also get your cell carrier's support line to walk through the process with you. If not - time to get a blackberry - better camera.

No, Only your music if you have the iPhone iOS6, a Answered a guys question of why his music was deleted and not his app's go ahead and update… Just save your music on a memory card or SB card.