Britney Spears' countdown clock ends tomorrow, but what does it mean for the singer. Speculation continues to point toward her big announcement coming tomorrow on Good Morning America, but what will it be?

TMZ reports that the announcement concerns her long anticipated Vegas-residency. The website reports that Britney will be raking in a cool $15 million to perform 48 shows per year for two years at Planet Hollywood.

Listen to the song here.