But seriously, how long did this take to do?! Shae-Lee, Lana, and Madison from the Australian comedy group SketchSHE traveled back in time for an epic new YouTube video. The gals mimed more than a dozen popular songs from over the past few decades — and recreated the music looks exactly! (How much did they spend at Party City?)

The three-minute clip shows the creative ladies sitting in a car and changing their outfits (with some seamless editing) every time they pretend to switch the radio station. Some of the classics included are Britney Spears' "…Baby One More Time," Eminem's "The Real Slim Shady," Whitney Houston's "I Wanna Dance With Somebody," and Beyonce's "Single Ladies (Put a Ring on It)."

But oh, the pop culture highlights just keep on coming. They joke about shaving their heads like Spears circa 2007, paint their faces like Gotye from his music video "Somebody That I Used to Know," and revisit the Elvis Presley and Michael Jackson era.

The grand finale? They go topless as they lip sync to Miley Cyrus' "Wrecking Ball."

Watch the amazing video above!