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Celebrity couples are often strange 鈥 take a look at the oddly matched but cute pairing of Gwen Stefani and Blake Shelton. Here鈥檚 one that might blow your mind even wider open鈥 Aubrey O鈥橠ay and Pauly D, both bastions of pop culture circa 2009, have been basically inseparable on Instagram (as pictured above). The two met while filming a new E! reality show, as one does these days. In celebration of their total #TBT, here are nine other reasons 2009 was the jam.

Special Screening Of "Slumdog Millionaire"

1. Slumdog Millionaire: Remember these two cute kids? It鈥檚 awesome how Dev and Frieda have grown up and gone on to do things like become style icons and A-list stars. Also, did you know they broke up two years ago and that he was six years younger than her? The dream of having two attractive, successful actors make it has been dashed, once again. (Photo via Stephen Shugerman/Getty)

GLASGOW, SCOTLAND - DECEMBER 14: Susan Boyle attends the BBC Sports Personality of the Year awards at The Hydro on December 14, 2014 in Glasgow, Scotland. (Photo by Karwai Tang/Getty Images)

2. Susan Boyle: This Scottish lady stunned the world 鈥 and more importantly, Simon Cowell 鈥 when she belted out 鈥淚 Dreamed a Dream鈥 from Les Miserables on Britain鈥檚 Got Talent. The video of her performance went viral and was one of the top plays that year, garnering 2.5 million hits in only the first 72 hours alone. Susan鈥檚 gone on to be a successful singer in her own right. (Photo via Karwai Tang/Getty)

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3. Avatar: Want to talk about #crushedit 鈥 2009 was the year Avatar surpassed Titanic as the most successful film of all time. The science fiction film took a whopping 15 years to come together, but it paid off, raking in two billion dollars worldwide to date. If reading this made you nostalgic, fear not: N鈥檃vis will return to the screen in sequels in 2017 and 2019. (Photo via 20th Century Fox)

WASHINGTON, DC - JULY 01: Visitors and journalists make photographs of the first family's dogs Bo and Sunny on the first day that photograph is allowed during White House tours July 1, 2015 in Washington, DC. Wednesday's lifting of the 40-year-old ban on photography during White House tours allows small cameras to be used and comes with its own social media hashtag, #WhiteHouseTour. (Photo by Chip Somodevilla/Getty Images)

4. Bo Obama: Can you believe it?! The dog that single-handedly brought Portuguese water dogs into American pop culture is turning seven this year. While he was technically born in 2008, he became an Obama in 2009. Fun fact: His name comes from singer Bo Diddley, as Diddley was Michelle Obama鈥檚 father鈥檚 nickname. (Photo via Chip Somodevilla/Getty)

attends the launch of VEVO, the world's premiere destination for premium music video and entertainmentat Skylight Studio on December 8, 2009 in New York City.

5. The Fame Monster: Hard to believe, but Ms. Stefanie Germanotta has been in the pop culture cannon for almost a decade. She really became a superstar with 2009鈥檚 mega-hit album The Fame Monster, led by her smash hit 鈥淏ad Romance.鈥 All the McQueen. All the fashion feels. (Photo via Bryan Bedder/Getty)

FORT COLLINS, CO - OCTOBER 19: Richard and Mayumi Heene of Fort Collins, Co. leave their home Monday with their three boys Falcon, 6, Ryo, 8, and Bradford, 10. The couple is possibly facing felony counts of contributing to the delinquency of a minor and attempting to influence a public official, and for a misdemeanor count of providing false information to authorities for their role in a hoax last week when they reported Falcon had been carried off in a homemade balloon from their backyard. The couple could face up to six years in prison and a fine of up to $500,000 on each of two felony counts. Officials contend the event was a hoax intended to garner the family more attention in hopes of landing a role in a reality television show. (Photo by Marc Piscotty/Getty Images)

6. Balloon Boy: The hoax of the decade (or at least the year) belongs to 鈥淏alloon Boy鈥 and his family, who claimed that they let a large helium balloon off into the air with their son Falcon inside. The balloon was silver and large enough to be mistaken for a UFO. Turns out young Falcon was never inside the balloon, costing the state of Colorado money and time for the ordeal. The parents pled guilty to the charges filed against them related to the hoax. (Photo via Marc Piscotty/Getty)

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7. Sexting: This now common texting practice was at its height in 2009, having first surfaced alongside the text back in 2005. It became part of the dictionary in 2012, and has gained immense popularity 鈥 and controversy 鈥 on sites like WhatsApp and Snapchat. Even your parents know what it means by now.

<> the red carpet during the CW Network celebration of its new series "The Beautiful Life: TBL" at the Simyone Lounge on September 12, 2009 in New York City.

8. Ashton Kutcher: Husband to Mila Kunis and father to baby Wyatt now, Ashton Kutcher hit the peak of his fame back in 2009 when he challenged the Internet to see who could be the first person to reach a million Twitter followers. These days that鈥檚 chump change (Kim Kardashian has an unbelievable 40.6 million followers), but back then, it was a pretty big deal. Also, RIP Demi and Ashton. (Photo via Amy Sussman/Getty)

<> on May 19, 2010 in La Habra, Orange, California.

9. Octomom: File this under things you wish you could forget 鈥 Nadya Suleman gave birth to octuplets in 2009. That鈥檚 eight babies at once, if your math skills are rusty. There was public controversy once it was revealed that she also had six other children at home. Her life opened up conversations surrounding in vitro fertilization, and she鈥檚 since fallen into relative obscurity. (Photo via Noel Vasquez/Getty)

Tweet us your favorite #2009 memories @BritandCo!

(Feature image via Jason Merritt + Ethan Miller/Getty)