Out of curiosity, do you also get the referring page information in your stats? If you have Blogspot, it might be possible to sign up with StatCounter (it's free) and see where your referring links come from and where your exit pages are. I believe what I did was add their code to the HTML code for the theme I used. Either that or I used a sidebar HTML widget to add an invisible hit counter.
I don't get thousands of hits on one page, but I do get most of my traffic on my (non-writing) blog from a few pages that have high search engine visibility and also Pinterest because those posts are related to organizing and DIY projects that are popular on Pinterest.
I'm wondering if your heart image is getting the hits because people are sharing it on sites like Pinterest and the traffic is coming to you to find the source? Do you have a link to the post in question? If the heart image is yours, there are a couple of ways to check and see if it has been used elsewhere. For instance, an image search called TinEye. Also Google Image search (you can right-click on your image to copy the link and then paste it into Google and select image search.)
To check if you have been pinned to Pinterest and shared and that link is bringing traffic to your site (which is great if you are wanting to attract traffic), you can type "http://pinterest.com/source/Your_Blog_Address_Here_Minus_http://www
). For instance, I can see what people have pinned from my page on my now pretty much ignored organizing blog by putting http://pinterest.com/source/behindcloseddrawers.wordpress.com
. If you go there, you'll see a bunch of spray painted white branches against the background of a teal wall I used to have.
It is also possible bots have found that page based on the topic being popular and have tried to get you to click back to their salesy or bogus website. So look and see if you have referring links to weird places.
If I think of anything else I'll let you know. Hopefully, some of this will be helpful. I used to have a Blogspot blog, but then I switched to Wordpress and I haven't gone back (although, let me tell you, I really miss being able to adjust my line spacing and fonts). Wordpress has plug-ins like Akismet that help block comment spam and it has been useful in showing me what blog posts are most susceptible to spam.