The following data was compiled by the gurus over at Splash Data.
As an IT Consultant I've seen many of these passwords used frequently. If you read this list and realize that you currently use one or more of these passwords your account is not secure.
Beyond the fact that they are so commonly used you'll also notice that very few of them use a combination of numbers and letters. We also highly recommend including a symbol as well as a mixture of capital and lowercase letters. These types of passwords are known as "High Complexity" and are much harder to crack.
We hope this information was useful to keeping your accounts safe and more secure. Thank you for reading!