The girls 'might' have got 5/6 hours sleep, but its not proper sleep that kids need, curled up on a plane seat. Plus the 3 hours they'd have been waiting around the airport as that's how long you need to arrive for International flights.
I do wonder if they were actually out and about in Dubai much or whether they did a couple of water slides, quick look at the mall etc to make it look like they'd be soooooper doooooper BU SYYYYY guyyyz.
Also, just me or does it really grate that she doesn't say a single word fully. its always A-MAZING, Su-per, Fan-Tastic etc....