Katy Perry

The beauty evolution of the pop star and 'American Idol' judge.

Alicia Keys, Dua Lipa and more.

Paris Jackson, Olivia Munn and more.

Rihanna, Gigi Hadid and more.

Vanessa Hudgens, Jessica Alba and more.

Rihanna, Lady Gaga and more.

Plus celebrity face shape examples to help you find your match!

Katy Perry, Elle Fanning and more.

Kendall Jenner, Ciara and more.

Olivia Wilde, Rooney Mara and more.

Naomie Harris, Léa Seydoux and more.

Bella Thorne, Alessandra Ambrosio and more.

Lily Collins, Alexa Chung and more.

Kate Bosworth, Rihanna and more.

America Ferrera, Bryce Dallas Howard and more.

Crisp ends make all the difference.

Rihanna, Kendall Jenner and more.

You've got more options than you think.

You can do this at home.

Katy Perry, Rihanna and more.

Beyoncé, Katy Perry and more.

Find the best fringe for your face with these tips and celeb examples!

Hollywood's go-to hair guru on her must-have products, favourite tools—and how to style your hair like her famous clients.

Sarah Hyland, Rita Ora and more.