This idea popped into my head and I just had to try it. I'm very new at this and open to advice.
Keep practicing that masking. You did a really good job around the flower but it seems a little rough around the bucket. I don't know if you thought about it but it might have helped to have the lily spherized to match the fish-eye look of the rest of the picture.
Your edges look pretty good! Missed little by the right seat. Also, maybe letting those cut stems come to an end on their own instead of at the edge of the bucket. The color and shaadows look really nice with the source photo.
Great idea! Your integration of the image is quite good - masking and blending are excellent. I think the flower and bucket would be a bit distorted though, like the stuff around it.
Thanks for the advice...yeah, a couple of the things people mentioned, I rolled my eyes at myself for not noticing that on my final check. Ah well, I'll learn someday :)