This couple on some romance free ebooks looked familiar to me. So I did a search and found this:

http://www.goodreads.com/list/show/15049.That_Girl_Hot_Guy_from_the_Obsidian_Cover

Sztella Tziotziosz and Péter/Pepe Tóth have been on over 70 book covers. 70+! That kind of ruins the book for me when the models are over used like this. Can’t book covers be more creative? Where’s the originality? People on this thread have even said they’ve gotten confused with seeing the same faces on so many covers. And a lot of the cover photos looks like duplicates.