How to gobsmack Emma Watson

Emma Watsons friends made 23 pinatas to celebrate her birthday.

The Harry Potter actress who celebrated her 23rd birthday in New York April 15 was shocked by the effort her pals went to for her special day, as they spent hours handcrafting papier mch models of her for each year of her life including one of her iconic character, Hermione Granger, in the hit fantasy movies.

A source told The Sun newspaper: Emma was gobsmacked when she arrived at the party to see all the pinatas. There was everything from her as a child, and as Hermione in the Harry Potter films, to her in the Chanel advert a couple of years ago.

They had even gone to the effort of stuffing a few of the pinatas with sweets and treats, so Emma could smash them open.

Watson was also left blushing as her friends created a few extra papier mch surprises male body parts in a nod to her role in The Bling Ring, in which she stars as a fame-obsessed teenager who robs celebrities homes.