At the same time, Brandi Cyrus, daughter of Billy Ray and half-sister (non-biological, but it's a long story) to Miley, tweeted: theBrandiCyrus There's currently a double rainbowwww in my backyard!
There's also the possibility they live near Nick Cannon and Mariah Carey:
Derek Hough OfficialDHough
Potty mouth Tweeter David Cook thedavidcook
Don't know who she is, but her Twitter picture looks fine, TheAndreaLowell Double Rainbow!!! It's so vivid!!! http://yfrog.com/jvbo8ioj
Ryan Seacrest and Ellen DeGeneres did not mention it, so it can't be real - or they are not Brandi and Kelly's neighbors.