She’s always up for a good time, and last night (September 23) Ashlee Simpson was spotted hitting up a new store opening on Melrose Avenue.

The “Pieces of Me” songstress was sans husband Pete and son Bronx as she strolled up to the arrivals area in a slinky black ensemble, showing off her skinny post-baby body.

Earlier in the day Ms. Simpson was hard at work, filming scenes for her hit CW revival of “Melrose Place” in Los Angeles.

And as usual, Ashlee was looking super-hot, sporting a sexy black and grey outfit while hugging costar Colin Egglesfield during a shot.