#TBT! Remember when Katy Perry and Miley Cyrus made smooch faces at the 2008 MTV VMAs?

MAJOR #TBT alert!! And also, my oh my how things have CHANGED!! In honor of the upcoming MTV Video Music Awards, we've curated a collection of seven GLORIOUS photos, documenting that special time when, in 2008, Katy Perry invited a then long-haired and way less twerk-obsessed Miley Cyrus to ride along with her the VMAs.

OMG. And we'll also remind you that this was during Katy's influential "I Kissed A Girl" phase, so of course Katy kissed Miley, and Miley kissed her back! Because when in Rome, right?

Check out more photos of Katy Perry and Miley Cyrus at the 2008 MTV VMAs after the jump.

Flash forward a few years, and both gals are performing at the 2013 MTV VMAs! More specifically, Katy's climbing out of manholes in her VMA promo video, lighting wigs on fire in her "Roar" teaser, and revving up for her debut live performance of "Roar" at the VMAs. And Miley? Girlfriend is now grown, free to kiss whomever she chooses (hopefully Liam though, right?), prepping her twerk, invading NYC subways, and smiling about her whopping THREE 2013 MTV VMA nominations. Time certainly flies when you're a pop star, now doesn't it?

Seriously, cannot wait to see how this all plays out. Also, just wondering if the ladies might consider re-staging this photo? That way we can place them side by side and play a fun game called "count the ways BOTH girls have become more ratchet since 2008."

+ PHOTOS: Katy Perry and Miley Cyrus kissing at the 2008 MTV VMAs.

Cast your vote NOW for this year’s Video Music Award winners from the 2013 VMA Nominees. The 2013 Video Music Awards air Aug. 25 on MTV and VMA.MTV.com, live from Brooklyn's Barclays Center. No sleep till Brooklyn!

Photo credit: Getty Images