They probably interviewed Kevin James because Paul Blart was filmed in the Burlington Mall.  As for Sandler, (being from NH)I would assume he's a c's fan even though he's a washed up, greedy, merger a deal with disney, sell out.  I love Kevin James though, he rules even if Blart looks bad.  I might see it just because of where it was filmed.
As for Marky Mark.  I can't stand him, but why are we all the sudden calling him a lakers fan.  I don't recall any of these guys sporting lakers gear, and if they did, they're just bigger sell outs.