I always have such a dilemma on deciding what to plant in my urns, but I think I've finally discovered the perfect combination of plants this year.
A caladium in a gorgeous shade of pink and green. This not only gives a little height to the container (normally these stand up a little straighter, not sure what's wrong with Mr. Droopy Pants), but also plays off the New Guinea impatiens.
This one's tag just said caladium (thanks so much for your detailed description), but from looking online, I think it may be the Rosebud variety.
And to hang over the edge, a creeping Jenny (Lysimachia) in a chartreuse color.
The last time I saw this much pink perfection it involved a Barbie doll, some tiny plastic shoes and a ball gown.