Teen superstar Miley Cyrus wants to take a break from her busy singing and acting career to work as a missionary in Indonesia because she's losing sleep worrying about global poverty.
 
The former "Hannah Montana" star, 18, reveals charity work is high on her list of things to do in 2011, and she is keen to help build wells to improve access to clean water in villages in the impoverished nation.
 
She tells Marie Claire magazine, "Honestly, I cannot sleep at night because I get so excited about doing good things for the world, changing the world."
 
The star's 2011 schedule is already filling up - she recently confirmed she's planning to return to the pop charts and embark on a big tour.

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