To keep dirty hair looking polished rather than doused in shoe polish, dry shampoo is a girl's best friend. It absorbs some of the oil, adds a fresh scent and bulks up hair so it can be styled. Hold spray-on versions a foot from your head and spray on oily areas. For those in shaker dispensers, sprinkle a bit of powder in your hands and work it into your scalp.
Bumble and Bumble Hair Powder
$35 at Bumble and Bumble