We can't WAIT to see Miley's new 'do! But just how short are we talking here? I guess we'll find out soon enough via Twitter!

Miley's hairstylist Chris McMillan posted the photo above and wrote "Good bye bun," and the 19-year-old starlet added, "it's happening ... if you don't have something nice to say don't say anything at all. my hair is attached to my head no one else's and it's going bye bye :)"

Miley is in NYC right now, and she's been counting down the days on Twitter (we were wondering what for -- now we know!). Last week Chris dyed Miley's hair super blonde, so it seems like she'll be keeping the color for now.

Can't wait to see the finished 'do! Stay tuned...