Real age of Katy Perry in The Smurfs
In the movie The Smurfs, Katy Perry was:
26 years old
That was the real age of the celebrity according to our calculation.
The calculation of the shown age took into account the first day of the year in which the movie The Smurfs was released:
January 1, 2011
And the day in which Katy Perry was born:October 25, 1984
Since movies usually don't take more than one year to be released since the beginning of the filming process, Katy Perry may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.