Yesterday Katy Perry, the most followed account on Twitter, got hacked. From TechCrunch:

This incident is yet another reminder that despite the platform’s security measures, no one’s Twitter account is safe—especially if they are a celebrity. Other high-profile Twitters that have been hacked include Justin Bieber, Lea Michele, and Britney Spears—and even the U.S. Central Command.

This is a good time to also point out that over the past week it looks like emails and passwords to over seven hundred million accounts may have leaked from LinkedIn, Tumblr, and MySpace:

There are some really interesting patterns emerging here. One is obviously the age; the newest breach of this recent spate is still more than 3 years old. This data has been lying dormant (or at least out of public sight) for long periods of time.

The other is the size and these 4 breaches are all in the top 5 largest ones HIBP has ever seen. That’s out of 109 breaches to date, too. Not only that, but these 4 incidents account for two thirds of all the data in the system, or least they will once MySpace turns up.

This is a good time to remind you to choose secure, long, and unique passwords for all your online accounts. I use, and recommend, 1Password.