try using a self-tanning lotion specially made for use on your face. don't apply too much though because you might turn too dark. just apply a little and when it turns the color (within 24 hrs. usually), apply more daily to match your body. i really WOULD NOT apply the lotion before an event, just in case you do turn orange!
try this: http://jergens.com/Our_Collection/Product_Detail.asp?ProductID=13 or
http://www.neutrogena.com/ProductsDetails_284.asp

hope this helps