What are the rare backgrounds on Club Penguin?

Well, The penguin band and Rockhopper might be the rare ones. But the balloon background is rare. The target background might be rare..

For the penguin band and Rockhopper one they must be the first backgrounds to ever come out on Club Penguin.

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I have the Balloon background.

Also others,such as the hydro hopper one and the one with the penguins jumping off of this pier or whatever.

And I have a blue lei and green duckie and flower headdress and green sunglasses and other stuff to