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Lauren Conrad And Lo Bosworth Were Just Like Romy And Michele At Their High School Reunion

Naturally, it had something to do with Post-Its.

Ten glorious years ago, Lauren Conrad and Lo Bosworth sat next to each other in their caps and gowns when they officially said farewell to their unforgettable Laguna Beach high school years. But for one night this past Saturday, the dear friends went "back to the beginning" (thank you, "Come Clean") and returned to their teenage roots. And if you ask them, the adventure to their old hallways and classroom scenery was straight out of the classic flick "Romy and Michele's High School Reunion."

Related: A Look Back At Lauren Conrad And Lo Bosworth's Special Friendship

Lo Bosworth's Instagram

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"Um, we invented Post-Its. #LBHS10YearReunion," new chef Lo captioned this Instagram snapshot while quoting the lovable gals from the 1997 comedy. But we have to ask: Who's the Mary and who's the Rhoda?

Related: 'Laguna Beach' Time Capsule Unearthed: 10 Relics That Were So 2004

We can only hope that they performed some sort of choreographed routine with an erstwhile guy classmate -- perhaps Stephen Colletti? -- just like Mira Sorvino, Lisa Kudrow and Alan Cumming did.

But back to the real SoCal gathering. It's unclear if Stephen, Trey Phillips and Dieter Schmitz were in attendance, but we know one person who didn't make the trip back to the picturesque town: the former Queen Bee herself, then-junior Kristin Cavallari.

Meanwhile, Jen Bunney made sure she didn't miss out on the gathering.

Jen Bunney's Instagram

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"Great time seeing old friends last night and introducing myself as Jen Dunphy #lbhs10yrReunion," the newly married brunette beauty captioned the photograph above with her hubby Taylor.

In honor of the LBHS class of 2004, relive their graduation in the "Laguna Beach" clip below -- and just try not to sing along with Vitamin C's iconic tune.