Either they're all smashed, or the heat is hellish in there (Or maybe a combination of both for some), so many of them are so sweaty and shiny looking.
Billie Piper, yea, those pictures aren't very flattering, she looks so skinny, her head looks too big (Is this just bad camera angles or has she lost weight)? Maybe it's the hair up making her neck look longer and her head bigger?
LOL, Andrew Lee Potts looks like he's about to pass out right there
Arthur Darvill is about the only one there that doesn't look bad. Matt Smith looks fine too, though that long piece of bangs is silly looking.