Stepping out for a fun-filled shindig, Britney Spears and Katy Perry showed up at the Hollywood premiere of “The Smurfs 2” on Sunday (July 28).

The “Oops I Did It Again” songstress looked to be in great spirits as she hammed it up in a blue and black Herve Leger dress and black pumps with her sons Sean Preston and Jayden James.

Meanwhile, Katy brought her grandmother Ann Hudson along for the ride and stunned the shutterbugs in a blue lace top over a knee-length matching leather skirt, skinny belt, and satin heels.

Slated to hit theaters on July 31st, “The Smurfs 2” is already getting great reviews. Per the synopsis, “The Smurfs team up with their human friends to rescue Smurfette, who has been kidnapped by Gargamel since she knows a secret spell that can turn the evil sorcerer's newest creation - creatures called the Naughties - into real Smurfs.”