The 28-year-old singer, who has a four-year-old son, Bronx, with her ex-husband Pete Wentz, was spotted holding hands with the Motown legend's son Evan, 24, after they enjoyed a night out together in Los Angeles on Monday night (01.07.13).
According to the MailOnline website the duo partied at Teddy's nightclub in Hollywood.
Ashlee, whose older sister Jessica Simpson, 32, gave birth to her second child, Ace Knute Johnson, in Los Angeles on Sunday (30.06.13), split from 'Boardwalk Empire' star Vincent Piazza in November after 18 months together.
The couple reportedly ended their relationship because their busy schedules were keeping them apart and friends originally thought they would get back together.
An insider previously said: ''Vincent has been working a lot, so he hasn't been able to spend as much time with Ashlee, which has caused some problems. It was a mutual agreement to split, but things have been bumpy for a little while, so perhaps they might reconcile.''
Ashlee is still on good terms with her Fall Out Boy star ex-husband Pete, who recently called her an ''awesome mother''.
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