I don't see anything to suggest an eyering, which is very prominent on a Nashville warbler, and there appears to be mostly olive and yellow in the upper half of the head where a Nashville would be gray. I don't see that much white, maybe in the center of the lower belly (which wouldn't be too visible typically, but in the second photo the bird is practically showing that area off with its pose), and then there's some gray on the flanks, but both of those things are pretty normal for orange-crowned.
Here's a link to a photo (not mine) that looks like your bird, and you can see the gray on the flanks and the white on the belly.
http://farm1.static.flickr.com/124/345881172_12db00a152_o.jpg
