'Till The World Ends' hitmaker Britney Spears has revealed that she will be making a huge announcement tomorrow morning (September 17) on 'Good Morning America'.

The beauty recently unveiled her new single, 'Work Bitch', and there have been hints of information about her supposed Las Vegas residency leaking all week although that is yet to be confirmed.

Writing on her official Twitter page earlier today, Spears told her 31.9 million followers that they need to tune into 'GMA' tomorrow in order to find out what the big news is:

"Have more big news coming Tues morning...make sure you're watching @GMA! You definitely aren't going to want to miss this."

Her manager, Adam Leber, posted a message about the release of 'Work Bitch' a few hours ago and apologised to her fans in the UK because it might be another month at least until the song is available on iTunes in Great Britain: "#WORKBxxCH won't be released on iTunes UK until Nov. don't shoot the messenger. I don't get the UK philosophy of waiting that long either..."