It's time to test your knowledge of what's happened this week with our favorite celebrities. Have you paid attention to everything that's gone down? Take the quiz!

1 of 10

Where was Nicole Richie spotted taking Harlow this week?

2 of 10

What did Demi Moore say she prefers to be called in W Magazine?

3 of 10

Who showed off a new hair color this week?

4 of 10

What was Katie Holmes caught wearing on set?

5 of 10

Which costar did Jennifer Garner have dinner with this week?

6 of 10

What did January Jones wear to the airport?

7 of 10

How old did Leonardo DiCaprio turn this week?

8 of 10

Where did Lauren Conrad run errands this week?

9 of 10

What event did Rihanna get emotional onstage?

10 of 10

Who posed with Mary-Kate and Ashley Olsen on the red carpet?