I think it depends of shutterstock licence. Based on http://www.shutterstock.com/license_comparison.mhtml it should be OK.
I usually first pick up the images I am going to use. Then I make the title out of the image . As for the body text I then usually pick up some text from Wikipedia that is related to the title .
+1, with one difference… For body text I rather use some of these: http://www.sitepoint.com/10-lorem-ipsum-alternatives/