Prom questionssss ten pts. best answer.?

i'm trying to decide if i wanna wear my hair up, half up & down, or completely down for prom. my dress is all black with glitter/sequins on it, and it's a strapless. it's floor length, and dips down to the middle of my back in the back. it hugs me uptop and then kinda poofs out towards the bottom. any ideas on how i should wear my hair? i have extensions to make it down to like my breasts so my hair is kinda long. any ideas? please and thanks. ten pts. to best answer!