how to fix the overexposure on this image?

[Zeealex]

hello photoshop gurus!
i have an image collection from when i was really bored at my cousin's wedding, and there's one, which the concept got me really fond of it, but the silly person i am, i left the flash on when i didn't need it.


that was the outcome, it looked okay on the camera but not when i got it off the card, how do i go about fixing the overexposure in the top left corner?

Thanks

 

[Stric9]

This is along way from perfect. I can send the psd if you want to see what I have done. I would also like some tips on how to fix issues like this.

 

[Zeealex]

thanks, if you can that would be great thank you

 

[Zeealex]

after a quick fuck about with blending options this is what i got :/
the difference in color doesn't look right >.< aah well, thanks to you Stric9 your fix was and is amazing

 

[hawkeye]

The sky is blown out so it will never be perfect but...You can use a curves or an exposure adjustment layer to help correct it some. Use the layer mask so that it only effects the over exposed areas. Adding a little blue sky helps too.

 

[Zeealex]

thank you hawkeye so much choice now!!!