No, she is not at all yours in any shape or form. Checked your page and she doesn't resemble ANY pony in your gallery even slightly. D; Now stop being silly.
I've met like 13 other people who have named their OC(pony or non-pony character) "Star Struck" or "Starstruck" so it's not an uncommon name at all. I came up with it by myself while trying to think of a star based name. P; Total coincidence hun.