Currently situated on the west coast, Ashlee Simpson was busy tending to her motherly duties in Sherman Oaks, CA. The “Pieces of Me” singer looked cute and casual as she sipped a Sugar Free Red Bull and waited outside son Bronx’s school until he was ready for a pick-up.

As previously reported, Simpson and husband Pete Wentz called it quits back in February citing irreconcilable difference as the reason for their split. Since then, Ashlee has found happiness with “Boardwalk Empire” actor Vincent Piazza.