LOS ANGELES — Pop star Taylor Swift said her Twitter and Instagram accounts were hacked on Tuesday, but the rogue posts were quickly removed from the social media services. The 25-year-old "Shake It Off" singer, whose album "1989" has been atop the charts for the past three months, has built a following of young fans through social media and has the fourth-most popular Twitter account with 51.4 million followers. "My Twitter got hacked but don't worry, Twitter is deleting the hacker tweets and locking my account until they can figure out how this happened and get me new passwords," said a statement posted on Swift's personal Tumblr page. The Grammy winner was back to tweeting two hours after the hacking, in which users were asked to follow two accounts that Twitter now lists as suspended. "Cause the hackers gonna hack, hack, hack, hack, hack ...," Swift tweeted, mimicking the lyrics to her hit "Shake It Off." — Reuters