'Catfish' Star Sunny Cross -- Cops DWI Plea ... Next Time I'll Wear Flats!

"Catfish" star Sunny Cross -- who starred on the first episode of the show -- has just copped a plea in her drunk driving case ... and she'll stay a free woman.

Cross was popped in Arkansas in January, 2013 after driving on the wrong side of the road. We told she flunked her field sobriety test, blaming it on her Christian Louboutins ... they're a bitch to walk in.

Ultimately Sunny blew a .08 which made her just drunk enough for prosecution.

Sunny plead guilty to 1 count of DWI and was ordered to complete a substance abuse program within 90 days.