There have to be a billion covers like this, particularly recently. Here are three that stand out to me without even having to try looking hard:
Shrinking Violet by Danielle Joseph was published May 2009 by MTV publishers. Clearly, she’s covering her mouth with her shirt collar in this one. And perhaps this is the same model from another angle — you know how if you go into stock images, many offer similar images, this seems like one of those “similar images”:
Know of any others? I like the last cover best, probably, but all of them follow the theme. At least these are a little more memorable on their own.