Roxey is gorgeous!!! I agree that I think she might have lab in her... but the black spot on her tongue makes me think she might have some mix in her.
here here! she is beautiful! and she looks like a lab to me, too.
the black spot... well, my boyfriend has a pure lab and he's got a black spot on his tongue (it looks like he's got it pierced).

good luck finding her a great home!
what a fine person you are.