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?
The park
Coffee Bean and Tea Leaf
A kids' gym
Barnes and Noble
2 of 10
What did Demi Moore say she prefers to be called in W Magazine?
A puma
A cougar
A jaguar
3 of 10
Who showed off a new hair color this week?
Jessica Alba
Christina Aguilera
Ashlee Simpson
Rachel Bilson
4 of 10
What was Katie Holmes caught wearing on set?
A bathing suit
A ball gown
A mask
5 of 10
Which costar did Jennifer Garner have dinner with this week?
Patrick Dempsey
Jessica Biel
Ashton Kutcher
Julia Roberts
6 of 10
What did January Jones wear to the airport?
A striped shirt
A puffy jacket
A backpack
7 of 10
How old did Leonardo DiCaprio turn this week?
8 of 10
Where did Lauren Conrad run errands this week?
FedEx Kinko's
Bed Bath and Beyond
The post office
Home Depot
9 of 10
What event did Rihanna get emotional onstage?
Glamour Women of the Year
A book launch event
A charity benefit
European music awards
10 of 10
Who posed with Mary-Kate and Ashley Olsen on the red carpet?
Bob Saget
Sienna Miller
Joey Lawrence
Diane von Furstenberg
Guess Who?
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Guess Who?