As a noun (a cosmetic or a rosy color):
* She applied a light blush to the apples of her cheeks. (cosmetic)
* A delicate blush of pink tinted the sunset. (rosy color)
* The roses were in full bloom, a deep crimson blush coloring their petals. (rosy color)
As a verb (to become red in the face, usually from embarrassment):
* He blushed when she complimented his new haircut.
* She couldn't help but blush at the suggestive joke.
* The student blushed furiously after giving the wrong answer.
With an adverb (to modify the blushing):
* She blushed deeply when she realized her mistake.
* He blushed slightly at the mention of his past.
* The news made her blush uncontrollably.
Therefore, here are more examples:
* She carefully applied the blush to her cheekbones.
* The sky had a gentle blush just before sunrise.
* He blushed when she caught him staring.
* Her cheeks blushed pink with embarrassment.
The correct usage depends on the context. Remember to consider whether you're talking about the cosmetic, a color, or the act of turning red.