Hi there. I'm a new member so I wasn't able to reply to my previous post. I'd like to thank the members for helping me and advising me that putting chocolate decorations on buttercream icing will be fine and the chocolate won't go soft etc. I've posted a photo of the final product. The party is tonight so hopefully my Mum likes it. Thanks everyone and keep caking. 

oh she’s gonna love it!! it’s beautiful 

Aww, it is beautiful, DancesWithCake!  Yes, she will love it!