She's appearing at Wembley Arena on the 9th of April. Im going to ask her to personalise the autograph. Is that rude asking an artist to do that? how would I ask that in my letter?
I've never done it, but I don't think it's rude. After you ask for the autograph, you might say something like, "It would be great if you could personalize it, although I would certainly cherish it either way." I don't know. Something like that. Adjust it to your personality.
Also, don't forget to send a photo, and if the concert is April 9 you want to send that really soon. Like tomorrow, or at least within the next couple days. You may have already known that, but I see you're new here and may not have sent VV before. Hope I helped some!