Stuck application in iPod touch

Hi to all of you,
I'm having problem on how to remove an application on my iPod.
This is an application which I used to play, and I download it on iTunes.
I tried to upgrade it using WiFi but then it just keep saying "waiting".
I waited for more than an hour for it to be upgraded, but nothing happened instead it is stuck in "waiting" mode. Until now, the game icon is blank and has changed to "waiting" . I
can't open it and I really tried removing it on iTunes but nothing happened. This game is called "Roby the Talking Robot".
Does anyone know how to remove the "Waiting" Icon in my iPod?
Thank you very much in advance.
Here is a screen shot of the "waiting" icon in my iPod.
Anna
