Jul 28, 2013 at 5:30 pm

Katy Perry & Neil Patrick Harris: 'Smurfs 2' Premiere

Katy Perry arrives at the Smurfs 2 premiere held at Regency Village Theatre on Sunday (July 28) in Westwood, Calif.

The 28-year-old entertainer brought along her lovely grandmother Ann and even ran into Britney Spears on the blue carpet. She was also joined by her co-stars Neil Patrick Harris and Jayma Mays.

PHOTOS: Check out the latest pics of Katy Perry

On the east coast, Christina Ricci and Hank Azaria stepped out for the premiere at the Lighthouse International Theater in New York City.

FYI: Katy is wearing a Tadashi Shoji dress and Pedro Garcia heels. Christina is wearing a Thom Browne dress, Casadei shoes, Harry Winston jewels, and a Jimmy Choo bag. Jayma is wearing a Paper London dress and Brian Atwood shoes.