He kicked in $7MM of his own money. Don't know how much total cost was... Label likely covers some of it. Plus management company, Roc Nation, that's Jay-Z, he can afford it, lol.
Didn't the NFL or whomever want the artist that did the halftime show to pay them for the right to do it? I remember some talk about that a year or three back. Bruno Mars is a midget and sucks!