What is it called?

It is a scooter type thingy. It has two wheels long stick and handlebar. the wheels are side by side and the stick is in the middle between the wheels. YOu see them on tv. If you watched the simple life Paris was mopping the floor with it.

its on the tip of my tongue...errr

there popular with celebs

the dang segways!!!! but wow..them things run about 3-4K..holy!

I think you are talking about the Segway Scooter:

http://www.segway.com/

That is the Segway.

Vespas are cooler though not as sidewalk friendly.

Its a Segway.

Segway - it benefits people who cannot walk a long distance.
They cost approximately $2K.