Adding a Celebration to A Resort Reservation?

[obrienminnie]

Hello all,

Just made my resort ressie for a POR RGR for July 2013!! Cant wait!! Just a quick question. When I was finished booking online, I noticed that you could click to add a celebration to your reservation, but I went to the next page to link my ressie to My Disney Experience, thinking I could go back at any time to add my celebration. Does anyone know if I can now add my celebration, and if so how do I go about doing that?

Thanks