Transcript for CeeLo Faces 4 Years for Allegedly Drugging Woman

Reporter: Cee lo green, frustrated on last night's "the voice." Well, to say the least, i this I they both deserve it. Reporter: Will be facing a judge of his own this morning, likely with a more subdued tone. He is due back in court today for the first time since entering a not guilty plea in october to a felony charge of furnishing a controlled substance. The not guilty plea is entered. Reporter: Prosecutors say the 39-year-old grammy winner had dinner with a 33-year-old woman in los angeles more than a year ago. During that dinner, according to prosecutors, he slipped the woman the drug mdma, also known as ecstasy, before accompanying her to her hotel room. Accusations quickly made headlines, including her claim that she woke up naked next to the singer. While green hasn't shied away from cameras. He requested no cameras be allowed in court. That request was denied. ♪ Maybe I'm crazy ♪ Reporter: The "crazy" singer denies sexual assault allegations. And his attorneys told abc news, the woman's claims are false and unfounding. Insisting any relations between the music mogul and the woman were consensual. Prosecutors say there's never enough evidence to charge green with a sex-related crime. Some experts think it may be tough for the prosecutors to prove the drug charge. He's a popular celebrity in los angeles. The prosecutor has to consider that because the jury is going to like cee lo green. Reporter: This morning, the "forget you" singer is finding out, even without the sexual assault case, prosecutors haven't forgotten about the drug charges. If convicted, he could face up to four years in prison. For "good morning america," aditi roy, abc news, los angeles. All right, thank you.

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