$6.6 billion: Amount Americans spend yearly on proms

$250-$400: Average amount spent by girls on a dress

$80-$180: Average amount spent by boys on a tuxedo

$50 to $175: Average amount girls spend on their hairstyle

$60-$80 Average prom ticket price with a meal included

$0 to $400: Amount teens spend on prom transportation such as limos, rental cars, party buses and borrowing their parents' cars

Source: PromSpot.com/The Knot Inc. and Conde Nast Bridal Media