You are just slightly overweight.. nothing to worry about you are probably just thickening.... Its a stage you go through in puberty where your waist disappears. It means you are about to have a growth spurt.
if really depends on your height
If you are 11 years old your average weight would be about 50kg
49-59kg
49 x 11 = 539
Your ideal weight should be 64-67 Kg. You can find a weight calculator in the related links below.
Amr Diab is 49 years old (birthdate: October 11, 1961).
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Eric Vanderaerden is 49 years old (birthdate: February 11, 1962).
Susan Lindauer is 49 years old (birthdate: January 11, 1962).
Tom Dumont is 49 years old (birthdate: January 11, 1968).