¿straight Hair Or Wavy Hair?

[Britnoy]

How you like Britney's hair the most?

[LiaLovesGodney]

Straight hair, either hanging or in a ponytail, always looks so good on her.

[laracroftonline]

wavy looks more natural especially in blonde!

[I_need_me]

It depends on how they style her hair because sometimes she looks incredible with wavy hair and sometimes it doesn't look that good. I'm gonna go with straight because we rarely see her like that and because I'm still slayed by this picture:

[Dance]

Straight hair, she looks young, sexy and fresh in it  

[Britnoy]

I forgot to comment lol
I like both but I think the straight hair fits her more with her face shape & makes her look younger. 
The wavy or curly hair makes look a little chubby sometimes...
I love when she pulls her bangs back like last night. She have an amazing hairline and her face looks way better that way, imho.