here is some info, i'm not sure how far in advance you can book it
Bibbidi Bobbidi Boutique
For all those little girls dreaming of being a Disney Princess, this latest addition to the World of Disney is the perfect fit. More of a salon than a store, there are 10 salon stations where girls can get their hair, nails and makeup done.
A second Boutique is located at Cinderellla's Castle in the Magic Kingdom.
Reservations are strongly recommended. The number to call is: 407-WDW-STYLE.
Package Prices:
NEW!! HANNAH MONTANA PACKAGE
$109.05: Package includes a wig, T-shirt, makeup, headset, backstage pass makeup kit, guitar purse, and commemorative photo
Exclusive to the Downtown Disney Bibbidi Bobbidi Boutique - Begins February 17, 2008
COACH: Hair style and shimmering makeup - $44.95 plus tax
CROWN: Hair style, shimmering makeup and nails - $49.95 plus tax
CASTLE: Hair style, shimmering makeup and nails plus full Princess costume with accessories and photo package (one 6x8 and four 4x6 pix) - starting at $179.95 plus tax
COOL DUDE: Hair style, colored gels and a Mickey stencil - $10 (no tax)
With the addition of the Boutique, there's been an expansion of Princess merchandise.