Best fake tan?

Hey all, I’ve got my sister’s wedding at the end of the month and I wanted to not look like a ghostly Victorian child for once.

I’ve never used fake tan before so I was wondering which would be best for someone using it for the first time? And how the hell do you apply it to your back? I’ve been looking at the coco and eve one, but I’ve been told St Mortiz is good as well.

Any advise/ tips would be appreciated!