Nicole Richie and Adam Goldstein Split for Second Time  5/21/06

Nicole Richie and her boyfriend DJ AM have called it quits for the second time in five months, according to media reports.

Richie and DJ AM, real name Adam Goldstein, have had an on and off relationship for the past three years and called off their engagement last December (05).

A source tells US publication Star, "Adam basically dumped Nicole. He didn't want to keep going when it was going nowhere."

The couple reconciled in early 2006 and were reportedly planning a July (06) wedding.

Richie's representative, Cindy Guagenti, told the magazine, "We are not commenting."

Goldstein was spinning at the opening of the new Parasuco store in New York City on Thursday night (18MAY06), where Lindsay Lohan joined him as his special guest in his VIP area.

The pair posed for photographs and left the event only moments apart, according to website TMZ.com.