Is Emma Nowell (from Hi-5 UK) Melinda Messenger's sister?

Don't know how many other people have noticed but they both look the same and their voices sound similar too. Surely the familiarity is too great for them not to be related?

height:
hi-5? never heard of them

Kerry K:
I didn't realise HI-5 had a UK version - I thought they were Australian and American...just goes to show lol