Songfacts®:

• Swift sings of the conflicted emotions of being aged 22 on this collaboration with Swedish producers Max Martin and Shellback. She told Billboard magazine: "For me, being 22 has been my favorite year of my life. I like all the possibilities of how you're still learning, but you know enough. You still know nothing, but you know that you know nothing. You're old enough to start planning your life, but you're young enough to know there are so many unanswered questions. That brings about a carefree feeling that is sort of based on indecision and fear and a the same time letting lose. Being 22 has taught me so much."
• Taylor told Ryan Seacrest the inspiration for the song: "I wrote that about my friends," she said, "like finally I've got this amazing group of girlfriends and we tell each other everything, we're together all the time. And I think that was kind of the marker of me being 22, like having all these friends and there's all these question marks in your life, but the one thing that you have is that you have each other."
• The song's music video sees Taylor hanging out poolside on a beach with her friends, including former Gossip Girl actress Jessica Szohr. The clip was directed by Anthony Mandler, who previously helmed Swift's "I Knew You Were Trouble" visual. "It was shot last month in Malibu and I've never had this much fun shooting a video, because my friends in the video are actually my real life best friends," Taylor told Good Morning America when she premiered the video on March 13, 2013.
• This was the second numerically titled Swift song to chart on the Hot 100 having previously sent "Fifteen" to #23 in 2009.
• The song featured in a Diet Coke ad, in which we see Taylor jotting down the song's lyrics as fans sing along to the tune. The message being that Diet Coke helps Taylor, "Stay Extraordinary."
• Swift dedicated the song to two of her close friends, actress Dianna Agron and singer/actress Selena Gomez.