This document provides a summary of celebrity hairstyles and hair trends, mentioning celebrities like Cheryl Cole, Posh Spice, Britney Spears, Penelope Cruz, Aaron Eckhart, Johnny Depp, David Beckham and Brad Pitt. It discusses hairstyles like the boyfriend style and medieval style. It also notes that styles often change from long to short hair and references Bo Derek who was known for braids. The document aims to inform people about celebrity hairstyles and hair changes over time.