My daughter has a friend that she really cares about. But this girl has a very offensive female scent and my daughter does not want to hurt her feelings. Any advice on how to approach this subject ?

I know the recommended approach is to approach the other person tactfully and say "There's something I need to tell, as a friend..."

Personally, I tend to say "Wow, you need a shower", pretty much the same way I'd say "Wow, you got drenched in the rain".

Honest approach, if they are really a friend, they would love and respect the other person enough to let them know