Sent wrong arts supplement?

On the Yale application, I mistakenly sent a music supplement to the “arts” supplement, rather than the “music” supplement. The music one is due on the 7th, so I still have time. However, what should I do about the fact that I submitted a non-art supplement to the art department?

Don’t worry about it. Supplements are reviewed at the discretion of the Admissions Committee. If the Admissions Committee likes the required elements in your file, they’ll probably review your supplement – and they’ll find the music supplement, even if it was submitted under the “arts” supplement.