Some characters in Dead or Alive 5 (DOA 5) for the PS3 and Xbox 360 have alternate hair styles that can be selected.
To select different hair styles, do the following:
On the costume select screen, highlight a character and hold LB or RB on Xbox 360, or L1 or R1 on the PS3, then press and hold any Hold, Punch, or Kick button.
Check out my other article for a complete list of unlockables, cheats, tips, and tricks for Dead or Alive 5.