While we look back at some trends from the '70s and gasp in horror, others are actually returning to popularity, like these ...

How men's hairstyles have evolved over the last 100 years. ... It was hip to be a hippie. ... Cobain-inspired haircut is similar to the '70s look, but with a more matted texture.

4. Sleek and Straight. The disco era also featured plenty of sleek, straight locks. Also known as ‘Cher Hair,’ this is one of the '70s hairstyles for long hair you need to try out.

As workplace dress codes loosen, men are looking back to the 1970s for hairstyle inspiration. As Caitlin Agnew learns, for many guys, shaggy locks are a rite of passage ...