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.

Lil Nas X is facing four felony charges after allegedly assaulting police officers who confronted him for roaming the streets of L.A. while naked.

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,