Adam Goldstein (born March 30, 1973) is better better known as club DJ DJ AM. He dated socialite and reality TV star Nicole Richie for about a year until they were engaged on her birthday of 2004. The engagement was announced in early 2005.

Adam Goldstein was also formally a member of the rock band Crazytown, known for their one hit wonder "Butterfly"

Source: en.wikipedia.org