'Her artful smile so lovely, her fine eyes so bright' comes from 'The Stately Lady' in the Airs of Wei, Book of Songs.
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history
The ode praises 庄姜, a princess of Qi who married Duke Zhuang of Wei. It compares her fingers to soft shoots, her skin to 凝脂 'congealed cream' and her neck to a 蝤蛴 grub, and 硕 'tall, stately' was itself praise: height was part of beauty.
usage
Because of this ode, 'the stately one' became a literary name for a beautiful woman, and its line 巧笑倩兮 is still quoted to praise a charming smile.
