Mary-Kate and Ashley Olsen release designer dry shampoos

It's official: You now can get Mary-Kate and Ashley Olsen's famously tousled, lived-in tresses (or something similar), courtesy of a can.

On Tuesday, the fashion moguls released a pair of dry shampoos as an extension of their Elizabeth and James Nirvana hair and body collection.

But how do these $28 sprays stand up against the definitive holy grail of all dry shampoos, you ask? They make more scents. Elizabeth and James Black and White dry shampoos are infused with the same notes that you can find in the brand's perfumed products. No time for a shower? Refresh those oily strands while smelling like a spring garden in Nirvana White. Opt for the darker of the duo and get volumized hair with hints of violet, sandalwood and vanilla.

The foray into hair care seems like a natural progression for the CFDA-award-winning fashion designers. But with the influx of celebrity beauty lines, this also got us thinking: Excluding endorsements of major beauty brands, where are all the other sensible, celeb-backed hair care products? Sure, we have hair extension lines from a crop of reality stars. But, there seems to be an untapped market for everyday hair products that could perfectly align with a few specific celebs. Let us inspire those money-makers below.

Hairspray: Every girl, country or not, likes a stay-put hairdo. Though, we're thinking a volume fanatic like Carrie Underwood would benefit from her own hairspray line. The bigger hair the better, right?

Shine serum: What's smooth, sleek and ever-chic? Posh…Spice, that is. Whether she's sporting long strands or an edgy bob, Victoria Beckham knows no such thing as dull, frizzy hair.

Sea salt spray: One word: Gisele.

Mousse: How do you build body and volume without weighing down hair or losing your natural curls? Blake Lively should bottle up a formula, stat.

Hair masks: With every dye job, there is risk of hair damage—no celeb probably knows this better than Nicole Richie, purveyor of unicorn hair. Somehow, though, her hair always seems to look healthy and luminous. Restorative and conditioning products like hair masks are essential to that.

Elizabeth and James Black and White dry shampoos are exclusively sold at Sephora.