Tidal ambassador Beyoncé's announcing something on Good Morning America at some point in the next 24 hours.
As you can see from this promo clip thing, it's being billed as "something amazing" and, as Beyoncé says herself, "something I have to share with everybody".
So it's not likely to be anything to do with music given that she likes to surprise people with that.
Perhaps the world will be blessed with a fashion line, a new perfume or a charity-related endeavour.
UPDATE: It's something to do with her promoting a vegan diet book. :(