Eva Mendes' Haircut
A: The hairstyle Eva Mendes is sporting at these events is based on a simple, shoulder-skimming blunt cut with long, angled bangs. The hair is styled for volume and soft waves and given the look, I suspect that the hair is initially blown out for lift and volume and then the wave and curl added using Velcro rollers and an application of heat.
The forward side section on the left is smoothed and tucked neatly behind the left ear, while the rest of the hair is brushed out into a soft fall of waves and curl.
As for whether or not this haircut is still "in style", a better question is whether or not the hairstyle will flatter your face. Recent hair trends have grown shorter, but generally only among those women for whom shorter hairstyles are flattering, and more specifically, among those who want shorter hair.
If you like this style, and you and your hairdresser both feel it would look good on you, you should go with it.
See also:
Eva Mendes hairstyles
Medium length hairstyles
How to blow out hair
Roller styling with velcro rollers