Ashlee Simpson was straight faced as she stepped out after dinner with a friend at Il Sole in LA last night. It's been a busy week of nightlife for the actress, though things took a dramatic turn at Monday night's DJ Hero launch party. Ashlee apparently got in a bit of a tussle with Pete Wentz's ex Michelle Trachtenberg but has since apologized. Hopefully the rest of the week will go more smoothly since tonight he is set to throw a runway show with Nicole Richie, and this weekend the couple will celebrate Pete's 30th birthday party in Vegas.
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