The Work Christmas Party

So tonight is the big annual work Christmas party! What should I wear. The black sweater, the ivory sweater, the white sweater with the big red bow across the breasts. Black pants, white pants, plum pants?!? I am supposed to leave in one hour, feed the kids, clean a bathroom or two, and prepare for the commute into the city. Wish me luck and I will fill you in on the party later.