Jennifer Aniston, Jon Hamm, Amy Poehler, and More Stars on Set

March kicked off with a work-heavy week for some of the biggest names in TV, film, and music. Jennifer Aniston maintained a low profile on the set of an untitled project in Stamford, CT, while Amy Poehler took over a carnival with her Parks and Recreation costars, Rob Lowe and Adam Scott, in LA. Also in LA, Selena Gomez slipped on a '60s-style ensemble to shoot, as Jon Hamm suited up for his '60s-set hit show Mad Men.

Click through to see the rest of this week's stars on set.