Britney Due Back in L.A. Tomorrow

Though Britney Spears has been enjoying her time in Costa Rica with fellow scandal-magnet Mel Gibson and his family, OK! has confirmed that the pop star should be back home in Los Angeles as early as Monday morning, as her presence is required at an important meeting.

"She has a previously scheduled custody mediation meeting," one insider confirms to OK!, adding that it's highly unlikely the singer will call in sick to this gathering. "With the tight leash that her dad has on her, it would take an act of God for her to not be there."

Brit and Mel departed for his family home in Costa Rica last Thursday. The two have apparently grown close since their first meeting over dinner at Romanov in L.A. back in March.