July 3 (UPI) -- Rihanna and Nick Offerman praised the Smurfs voice cast in a "Behind the Voices" clip released Wednesday. Rihanna, 37, released the song "Friend of Mine," for the film and voices Smurfette, while Offerman voices Ken. "The Smurfs voice cast -- so many talented people. Everyone is so unique," Rihanna said in the teaser . "They've put together a team of all-stars," Offerman added. The voice cast includes John Goodman as Papa Smurf, Sandra Oh as Moxie Smurf, Daniel Levy as Joel,