Here are both sources for reference. As you can see, the source for the chrome was this really cool mirrored sphere. This was convenient, but not necessary. The same effect could be acheived with any image by using the spherize filter or the bloat tool within the liquify filter. The next step is to simply copy and paste the sphere over the cherry. Get the size close to that of the cherry. At this point, you can see it's going to take some doing to make it look like anything other than a sphere! (Incidently, I cloned out all the obelisks and their shadows for the actual image.)