Grammy-winning musician Lil Nas X pleaded not guilty on Monday to four felony charges after police say he assaulted officers who approached the singer while he was found wandering the streets of Los Angeles in his underwear.

The judge has set his bail at $75,000 and is requiring Little Nas X, born Montero Hill, to attend Narcotics Anonymous meetings. Police have said they believe the rapper was under the influence of drugs at the time of his arrest,

Lil Nas X has been charged with three felony counts of battery with injury on a police officer and one felony count of resisting arrest after he was arrested last week on Ventura Boulevard in Studio City.