When Matthew Weiner spoke at the Paley Center earlier this year, he discussed the music selection process on Mad Men, saying everyone has access to his iPod, and access to his music list—"it really comes down to having an emotional response to a song. I have no rules about it. They do not have to be from the period."

Last night's episode ended with Judy Collins singing "Both Sides, Now," and since Weiner always places great importance on the final scene of each season: Season 1 ended with Bob Dylan's "Don't Think Twice, It's All Right," Season 2 didn't have any music during the final scene, Season 3 ended with "Shahadaroba" by Roy Orbison, Season 4 ended with Sonny and Cher's "I Got You Babe," and Season 5's final scene was played out by Nancy Sinatra singing the theme to "You Only Live Twice."

Here's what else we heard on the show this season—strap on your Koss headphones and turn it up:

"Hawaiian Wedding Song," Elvis Presley

"Just A Gigalo," Bing Crosby

"Bonnie & Clyde," Serge Gainsbourg & Brigitte Bardot

"Friends I Haven't Met Yet," Blue Sandlewood Soap

"Love Is Blue," Paul Mauriat

"Baby Jane (Mo Mo Jane)," Mitch Ryder & The Detroit Wheels

"Reach Out Of The Darkness," Friend and Lover

"Going Out of My Head," Sergio Mendes & Brasil ’66

"Words Of Love," The Mamas and the Papas

"Dream A Little Dream Of Me," Ozzie Nelson

"Always Something There To Remind Me," Lou Johnson

"Piece Of My Heart," Janis Joplin ("Try (Just a Little Harder)" was also in this episode)

"Found Love," The Fly Bi Nights

"Harper Valley PTA," Jeannie C. Riley

"Porpoise Song," The Monkees

"Both Sides, Now," Judy Collins

Mashable has a growing playlist including songs throughout the entire series.