You might have also spent the three-hour-long musical questioning some of the show’s big beauty moments: How did the T-Birds grease back their dos? How did Sandy’s hair ribbons stay so secure?

Welcome to Retro Week, where we’ll be ... you’ll want a pomade with a high oil content—not a water based pomade. It will make your hair feel pretty, well, greasy, but that’s the idea.

Her innocent school girl look features a pretty retro hairstyle ... The look is classic and timeless. Rizzo’s hair is really curly, but leaving your ends out while using a curling iron will ...

Big in the 60s and 70s, vintage beauties would rub baking ... of auburn-locked Rita Hayworth, who kept her hair looking lustrous by applying olive oil to the ends of freshly washed hair and ...

Decades later, Bowzer of Sha Na Na told me his band's secret for slicked-back hair that washed out easily: K-Y Jelly.) Sha Na Na kicked off the craze in 1969, and "Grease," the original stage ...

Vintage hairstyles are all the rage right ... and finish by adding a very small amount of serum or argon oil to the rest of the hair for that beautiful healthy finish.

Vintage photos show just how different ... Men began giving up their gel and grease from the '50s and growing their hair out to achieve the mop-top made popular by British pop groups like The ...