Eeeeek! James Corden announced Beyonce will definitely be performing at the Brits on the Radio 2 Breakfast Show this morning - and it'll be a track she's never sung live before!
Rumours that the singer will hit the stage tonight have been circulating for ages but this is the first time it's been officially confirmed.
We managed to catch up with The Mamas - Beyonce's backing singers of eight years - at the Brits Backstage Spa yesterday to talk about the performance.
Vocalist Tiffany said that Beyonce was 'absolutely amazing' to tour with, telling Grazia Daily that her career highlights so far have included Glastonbury and the Super Bowl.
Tiffany laughed 'of course, we're excited' when asked if they happy to be at the Brits, but admitted she had no idea what Bey would be wearing yet.
'I don't even know what I'm wearing yet,' she said.
Also no clue whether little Blue will be in London for the event - or how cute she is.
'I see my son,' said Tiffany. 'The other girls have sons and daughters. That's all we concern ourselves with.'
The Mama's had their own dressing room along with rows and rows of shoes and clothes laid out for them . They were taking full advantage of the all the beauty treats available at the spa, booking themselves in for manicures and facials as well as grabbing goodie bags.
'I'm a sparkly Mama!' one of the girls was overheard exclaiming as they tried a skin illuminating product from tanning brand Kilpatrick, explaining it would look great under the stage lights.
We also overheard the girls sound checking with a fake Beyonce (the real one will only arrive this afternoon) before we left so yep, we know know what she's going to sing, and no, we're not going to tell you. You should be VERY excited though.