"She has been filling out the place every night, and she is enjoying it and is in good health. She has a good life, coming in on private jet," he added.
Selenser said the company took a "gamble" when they signed the singer, but despite the fact she was caught lip-syncing throughout her 90-minute performance, people still flock to see Spears.
"You just didn't know what was going to happen. But the fans loved her. And she has so many fans from all over the world that the support has been fantastic," he said.