A user was able to gain control of the band's social networking page on Wednesday morning (October 17), and pretended to be an intoxicated Shirley Manson.
Tweets included: "Getting a lot of questions about what I'm drinking. Is it that obvious I'm drunk??? Vanilla Malt and a few coolers :)" and: "There will be whipped cream and Shirley for all."
They also posted lyrics from The Fresh Prince of Bel-Air's theme tune and asked "really attractive girls" to post photos of themselves for 'Shirley' to retweet.
The hacker later boasted of their internet skills, saying: "I hacked this stupid motherf**king band and have been f**king with you for ages!"
Among the tweets, the hacker also posted several spam messages, writing: "All you people saying I'm dumb. I've made over 19 dollars by spamming ad.fly links. I hack twitters and spam them great money."
Manson was able to regain control of the account hours later, saying: "Hey guys its Shirley... I don't know what to think so I'm just going to take it 1 step at a time. Contacting twitter now. Anyone fill me in?"
The singer later apologised to "every single one of [her] fans" adding: "The hacker has tweeted hundreds of times and I cannot remove them all. Bear with me Sx."
Manson later told fans not to open any links from her account, and said that she will not be using any social media sites until the security breach has been looked into.
Earlier this year, Shirley Manson stopped a gig to reprimand a male fan for hitting a woman in the crowd in New Jersey.