One day after news of various private nude photos of celebrities, athletes and models were stolen by hackers and posted online, Apple's released a statement based on their findings. While various media cited an iCloud or Find My iPhone hack was behind the massive invasion of privacy, it appears as if social engineering, password fraud were the methods used to gain access to these accounts. Below is Apple's statement:
We wanted to provide an update to our investigation into the theft of photos of certain celebrities. When we learned of the theft, we were outraged and immediately mobilized Apple’s engineers to discover the source. Our customers’ privacy and security are of utmost importance to us. After more than 40 hours of investigation, we have discovered that certain celebrity accounts were compromised by a very targeted attack on user names, passwords and security questions, a practice that has become all too common on the Internet. None of the cases we have investigated has resulted from any breach in any of Apple’s systems including iCloud or Find my iPhone. We are continuing to work with law enforcement to help identify the criminals involved.
To protect against this type of attack, we advise all users to always use a strong password and enable two-step verification. Both of these are addressed on our website at http://support.apple.com/kb/ht4232.
Source:Apple
Tuesday, September 2, 2014 at 5:15PM 
