Two tweets were sent out to her 51.4 million followers asking them to follow @lizzard, who claims to have ties to the Lizard Squad, a black hat hacker group.
Swift responded to the cyber attack with a post to her official Tumblr page. "Well, now I'm awake...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. Never a dull moment."
Swift is one of the most followed account on the social media site, fourth behind Katy Perry (64 million), Justin Bieber (59.7 million) and President Barack Obama (53.9 million).
The pop singer's Instagram account was also hacked. A post was sent out to her 20.2 million followers with a photo asking them to follow @Trash.