'Girlicious' Star -- I Ain't No Cokehead

Natalie Mejia from the Pussycat Dolls reality show "Girlicious" just pled not guilty to one felony count of drug possession -- following her coke bust in Glendale, CA last month.

Mejia was arrested on March 10 after cops say she had more than a dozen bags of nose candy in her Gucci purse.

Mejia had been a passenger in a car that was pulled over for speeding when copsnoticed the alleged drug stash.