There are more than one artist with this name:
1) AM is an artist from the UK, who is a part of the drill collective 410, and one half of the duo within the collective, Skengdo X AM. Born in South London, AM is widely regarded as one of the genre's most skilled rappers, and was highly influential in advancing the genre in terms of lyricism.
2) AM is an indie rock band formed in the Los Angeles neighborhood of Silverlake, California . New Album Future Sons & Daughters was produced by Charles Newman (Magnetic Fields). Read more on Last.fm