It’s good to see “Mean Girls” star Rachel McAdams is back to riding her bicycle.

Canadian Rachel McAdams was known for her car free lifestyle in Toronto. When she had a close call with a bus while cycling in Toronto earlier this year, she said “enough” and decided to drive a car instead. It’s good to know she’s back to cycling.

CNN news guys Anderson Cooper rides a bicycle in Manhattan. Except when he’s walking the bike with his friend with a matching shirt.

Marisa Tomei also walks with her bike-walking friend in New York City. Like Anderson’s bike, this one sports one of Kryptonite’s heavy duty chain locks.

Agyness Deyn also walks her bike in the East Village.

Meanwhile on the left coast, people actually ride their bikes as Domenico Nesci so aptly demonstrates during filming of a promotion for the MTV Movie Awards. The prop master was careful to cover up the bike’s brand, but failed to inflate the rear tire. Oh well.

Actor Robert Pattinson tries to ride a green brakeless fixed gear bike during filming of “Remember Me” in Central Park, New York City. What authentic city bike details worked out by the prop master can you see on this bike?

You can also watch Rob ride a bike in this scene from the Spanish film “Little Ashes,” where Robert Pattinson plays a young Salvador Dali.

Jennifer Aniston was on location in Atlantic City for filming “The Bounty,” where she tries to escape a bounty hunter by jumping into a pedicab and then pedaling the pedicab in her bare feet!

Victoria Pendleton and Elle Macpherson promote the Mayor of London’s Skyride.

Victoria Pendleton is a world champion track champion and Olympic gold medalist. Elle Macpherson likes to ride a bicycle to get around and take her children to school.

Welsh TV presenter Gethin Jones also promotes the Mayor of London’s SkyRide.

More details at British Cycling’s SkyRide home page.

Urban bikes in mainstream PR.

I don’t have a clue who Duffy is so I’m late to the party — she’s a Welsh pop singer. Duffy rode a singlespeed bike in a European Diet Coke ad that aired last February. Note also the Terry Dolan product placement!