Best Celebrity Pictures | Week of Aug. 19, 2012

A lot of celebrity Summer fun went down this week! Katie Holmes helped Suri Cruise learn how to ride a bike in NYC, while Ryan Gosling got into his gangster gear on the set of Gangster Squad in LA. Miranda Kerr sported a bikini for a sexy Sydney shoot, and Jennifer Aniston showed off her abs making We're the Millers in Wilmington, NC.

That's not all that the stars got into — click through to see the rest of the action!