Louis Tomlinson's fans are freaking out!
See some of their concerned reactions (below):
[Image via Splash News.]
We're almost not sure which is which here!
We can't believe how much these two look alike with just a little switch of Nicole's locks.
With her darker hair falling a bit over her eye, we actually think she might've gone to Keith's hairstylist to get his exact look.
Ch-ch-check out more pics of Nicole on set with her new hair (above)!