A DDoS attack is not a successful hack, so the companies claim that no information got leaked is probably true. A DDoS attack comes into play when hackers gain control of other computers and use them to put a website under heavy traffic pressure with a barrage of requests which if successful ends with the website being unavailable for normal users.
While the company made clear that all information remained secure it also made it clear that the attack was deliberately aimed at iWantClips and that they don’t consider this an accident. Philips said: »We have determined that this was not an amateur attack and was, in fact, a deliberate, well-funded, and strategized attack to take down iWantClips. While deeply concerning and regretfully inconvenient to our artists and fans, this attack serves to remind us of the threat that the success of each and every artist on the iWantEmpire represents to certain individuals.«
The complete statement by the company can be read here.