I didn’t realize this is what really happened. From How Paris Got Hacked?:
Like many online service providers, T-Mobile.com requires users to answer a ‘secret question’ if they forget their passwords. For Hilton’s account, the secret question was ‘What is your favorite pet’s name?’
Naturally, you can find all of the photos from her Sidekick on-line.
(Hat tip to my buddy, Dan.)