Tip Question

How much do you tip the
photographers (i have 2)
and video???

AND

How much do you tip the DJ?

I think I am doing

Photographer $100 each (2)
Video $100
DJ $100 (but maybe more if he's really good)
Limos $50 each driver (2)
Bridal Attendants $25 each
Florist Delivery $25

Please tell me if I am over or under tipping anyone....