I've seen Diana Ross in the old CCR at T4.

It was about 7:30pm - she was tucked away in the VIP broom closet (for those who remember it) in the CCR but emerged to have dinner at the dining area - complete with sunglasses on - a flashing sign to say I am a star. After her meal she retired back to the VIP broom closet.

SS agrent arrived with a buggy at the door of the CCR to escort her and her pitiful looking aide to the plane. I think it was only a couple of gates away from the CCR (the old gate 10 lounge).

This would definitely be her type of travel requirements if only to avoid postings like this.
Suspect Posh and Becks with kids would also use the same. However, does Posh prefer VS or AZ so T3 not T5?