OT..I need help Native Hawaiian's

My mother's 70th birthday is next month and she love's Hawaii...we are going to throw her a surprise Luau and I want to get her a birtday cake and wish her happy birthday in Hawaiian..can you tell me how to spell that on the cake..Thank you so much Cher

According to a Google search, it is: Hau'oli la hanau You may also look for Leilani on the main msg. board. She'll know for sure!