I think is is more of a recolour than just simply drawing Celestia? I mean her hair isn't just pink and yellow, wait last time I checked she doesn't even HAVE yellow in her mane. It is adorable but yeah this is more of a recolour/new hair, but it's still super cute. But tbh I think the wings are a bit much. I think you should just choose one colour for the wings to fade into, I would pick pink to match her hooves but yeah you did a really good job with the drawing itself just please know I like this drawing a lot xD