for the lazy coons that dont wanna click the link above
"We are currently performing maintenance to upgrade the software for the PlayStation Network from January 17-19th. This maintenance is scheduled to end around 2:00am PDT (5:00am Eastern) Saturday January 19th.
During this maintenance period, you may receive a message that states “Sony Entertainment Network is undergoing maintenance” when attempting to access the PlayStation Network, PlayStation Store, or PlayStation Home.
If you have signed in to PSN within 5 days prior to the start of maintenance (meaning: any time since January 12), you may be able to play games online and enjoy apps such as Netflix, HULU Plus and Music Unlimited during this maintenance period.
Note: During our current maintenance some authenticated users may have lost access. We apologize for this inconvenience and are working hard to restore access as soon as possible."