Just finished watching this week's South Park episode, and the smurfs were in it.
Long story short: Eric Cartman went to live with the smurfs, falled in love with smurffete (red hair!!!), had to prove himself to Papa smurf that he was worthy of her , Wendy came and flattened the smurf village and killed all the smurfs.
You can see all the story in the new movie made and directed by Eric Cartman "Dances with Smurfs"...
Ok, all of it happened in his head, but still...