By Breaking Celebrity News Staff

Brooke Mueller lost her passport, and was unable to leave for rehab in Mexico, to take the controversial drug ibogaine, which isn't legal in the U.S., Breaking Celebrity News is exclusively reporting.

"Brooke made it to the gate with her doctor, who was going to accompany her, but the airline staff wouldn't let her board the plane. Brooke is going to get an emergency passport on Wednesday, and hopes to leave for Mexico as soon as she gets the new one," a source close to the situation tells us.