I'm not sure, but there's going to be a wishing star tonight, or my name isn't Winnie the Pooh, which it is.

10 seconds sound clip from The New Adventures of Winnie the Pooh - The Wishing Bear (S1E16).

You can hear this line at 00:18:27.880 in the Blu-ray version of the TV Series.

Quote context

[...]

- Pooh Bear! All right, Pooh, I think you have some explaining to do.

- And because it was my wish that pooped the star, I had to do something to make your wishes come true.

- But, Pooh, what happens when Christopher Robin comes to ask the wishing star for a wish?

- Christopher Robin!

- We can't let him know what I did to his wishing star. He'd never speak to me again.

- Yeah. Bu what can we do, Pooh boy?

- I'm not sure, but there's going to be a wishing star tonight, or my name isn't Winnie the Pooh, which it is.

- Do you think, if I'm far enough away, that Christopher Robin will believe I'm a star?

- Sure. Just remember to look twinkly.

- But, Pooh, why must you go so very up?

- Because otherwise I'll let Christopher Robin down.

- Goodbye, Pooh Bear.

- Yeah. So long. Be sure to write. If you ever learn how.

[...]