The set of Jennifer Aniston’s new movie Just Go With It is like a daycare center — and that’s just fine with Jen! “I’m constantly getting a kid fix!” the actress tells Entertainment Tonight about being surrounded by the children of co-stars Adam Sandler, Nicole Kidman and Dave Matthews. Adam says that his daughter Sadie is all over the Friends actress. “ I call her 'Fifty-Fifty Sadie.' When she's nice to Jennifer, I'm in a good mood,” Adam admits. “When she's nuts, I'm like, 'Sadie, come here for a minute. That's Jennifer! It's fine.'" The cast’s kids have become best buddies on the set. Says Nicole, "It's wonderful. There is a little school all set up. [Dave has 2-year old son] who [my daughter] Sunday likes." Just Go With It will hit theaters on Valentine's Day 2011.