AMC’s Mad Men entered its seventh and final season on April 13. It's a show that has garnered a lot of enthusiasm to step back in time and work in the world of Madison Avenue advertising in the '60s (well, amongst some men at least!).

From the picture-perfect, all-American looks of Jon Hamm's Don and January Jones’ Betty to the ferociously independent va-va-voom of Christina Hendricks’ Joan Harris (née Holloway), the Emmy award-winning show is credited with bringing 60s fab to a nostalgic 21st century audience.

More: Watch our red carpet interview with Jessica Paré

With the impending end of an era, we decided to take a look at where it all began by tracing the show's slick style with a sample from every season.

We recommend listening to the theme song while you peruse.

CLICK THE PHOTO FOR THE GALLERY OF 39 MAD MEN LOOKS: