She celebrated her role as Smurfette wearing a pair of smurfy high-heels and a very smurfy white dress with her Smurfs character adorning the front. Katy also accessorised with a Smurf manicure – the star had the cartoon characters painted on to her nails for the event.
Katy also had a Marilyn Monroe moment with that short white dress when the wind gusted through.
On the red carpet Katy was joined by some of her co-stars Sofia Vergara, looking stunning purple, Neil Patrick Harris, Jayma Mays and Tim Gunn.
Launch the gallery to check out all the red carpet pics from the event.
