Fleur the posing pony just loves to hang around, and hang on top of, other ponies.
Some ponies are just too unpredictable to pose with. This is a prime example.
Fleur and Twilight: [link]
Fleur and Fluttershy: [link]
Fleur and Applejack: [link]
Fleur and Rarity: [link]
Fleur and Rainbow Dash: [link]
Fleur and Derpy: [link]
Thanks to whoever sent this in to Equestria Daily [link]
A nice surprise, I wasn't prepared for that
All MLP:FiM characters are © Hasbro