Petal cake tutorial by The Cakeldy. (I think she did it on a birthday cake, but it can easily be done on a wedding cake instead.) It's two parts. The link takes you to a Facebook photo with part 1. Go to the next photo in her album for part 2.
@mardoy31 I could use your art skills with this one ;)
Another Pam McCaffrey cake, this one is just bright and happy.