I'm not sure, I found it on a Celtic Woman Facebook page, But I agree with you it's really bad PR/Marketing if it was them.
If it was an armature then I think they need some more practice.
I'd say it is something not done by CW. Usually such graphics are posted on their FB page or website. I've seen it on neither. CW has always posted very good pictures, especially official ones.
Also, the level of compression is nuts.