Malin Akerman
John Sciulli/WireImage

Hot off filming a cameo as punk royalty Debbie Harry in next year’s biopic CBGBMalin Akerman shared a rockstar beauty tip of her own—how to create a great-looking hairstyle with little effort. “You throw it up in a bun, it’s the easiest way to impress,” she told InStyle.com at GenArt’s event honoring Vena Cava in Los Angeles, where she showed off the top knot she pinned for the evening. “I have an amazing friend who’s a hairstylist and she told me to get those little clear elastics at Rite-Aid and put it up in a ponytail and flip it around with some pins. So simple!” (Shop the elastics for $4 at riteaidonlinestore.com.) And she’s not the only one in love with this easy ‘do! See more stars showing off top knots in the gallery.

— Erica Helwick