In an interview with Extra's Mario Lopez, the pop star said her two boys, Sean Preston, 7, and Jayden James, 6, are "Little comedians" and "like attention."
Lopez, who has a two-year-old daughter, told Spears he was "very jealous" of her boys.
"Awww, I want a girl!" she said.
"You do want a girl!" Lopez teased. "So later on, maybe a little girl?"
"Yes!" she replied.
Watch her interview with Lopez: