Mailing List Wedding

Should I invite colleagues to the wedding party were invited to a surprise wedding?
A girl at work has a part bachelorette surprise for me and I am very grateful. I was not planning on adding 30 people to the list of wedding guests as well. It is a place of nice work, but I am close to many of them. Should I change my contract and plans to enable more people and start sending out invitations?
No need to add these people. The "official" shower her matron / maid of honor or their family members should be persons who are on the guest list … But an impromptu party launched by his colleagues do not need to add them to the guest list. The shower itself is a celebration of their marriage.
Gamble & Burke – The Kid is in Love (With Lyrics)