Unsung - 2008 Vesta Williams 4-15 was released on:

USA: 2 January 2012

Vesta - formally known as 4 Vesta.

It is an asteroid in the asteroid belt and was thought to be part of a protoplanet. (although the existence of any sort of planet existing, is under debate). It is the second largest object in the asteroid belt, after Ceres the dwarf planet [See related link].

You need to plant a tree that takes up 4 squares from Vesta in the afternoon. Vesta's the fat looking lady with millions of crops.

who is vesta kelly?

Vesta was the Roman name. Hestia was Vesta's Greek equivalent.