2013's Most Double-Tapped #ThrowbackThursdays of Instagram

We can't get enough nostalgia online, and the 127 million photos tagged #TBT (#throwbackthursday) on Instagram in 2013 prove it. Every Thursday, Instagrammers took to the social network to share sweet looks back at their childhoods, awkward teenage years, or even quieter times with a future president. Celebrities couldn't resist the trend, and their posts made up the most "liked" #TBTs of 2013. Read on for the most double-tapped Throwback Thursdays of Instagram this year.