Ashlee Simpson oozes summery chic in floral trouser suit at rooftop party in WeHo

Ashlee Simpson oozed summery chic while hosting a rooftop party this Thursday on a sunny day in Los Angeles.

The 37-year-old sister of Jessica Simpson slipped into a sleek black trouser suit that featured a white floral print.

She was throwing the fete at the West Hollywood restaurant and bar EP & LP to promote the Australian self-tanner Luna Bronze.

Ashlee, who followed her sister into the singing business, opted for an elegant ensemble that emphasized her enviably trim frame.

Letting her wavy blonde hair cascade freely over her shoulders, she went fo ra naturalistic look where her makeup was concerned.

She lent an extra dash of glitz to her look by popping on a pair of earrings and a subtle necklace for her rooftop bash.

Ashlee, who was wearing a black shade of nail polish to complement her ensemble, got in a bit of posing with a bottle of the self-tan product she was plugging.

Looking fab: The 37-year-old sister of Jessica Simpson slipped into a sleek black trouser suit that featured a white floral print

When you got it: Ashlee, who followed her sister into the singing business, opted for an elegant ensemble that emphasized her enviably trim frame

Aglow: Letting her wavy blonde hair cascade freely over her shoulders, she went fo ra naturalistic look where her makeup was concerned

She could also be seen sidling up to her husband Evan Ross, whose mother is Diana Ross and whose sister is Girlfriends star Tracee Ellis Ross.

Ashlee could also be pictured gathering together influencer Nicole Zajac and Luna Bronze co-founders Maddy Balderson and Rhiannon Mitchell for a group shot. 

Evan was wearing the same smock-like white top and high-cut black trousers he modeled later that night when he and Ashlee swung by another party.

Showbiz legacy: She could also be seen sidling up to her husband Evan Ross, whose mother is Diana Ross and whose sister is Girlfriends star Tracee Ellis Ross

Their second shindig that day was a star-studded Dolce & Gabbana affair with a guest list that included Doja Cat, Normani and Heidi Klum. 

Evan and Ashlee have been married since 2014 and have since welcomed two children – their daughter Jagger, six, and their son Ziggy, one.

Ashlee was previously married to Pete Wentz of Fall Out Boy fame, with whom she shares her firstborn son Bronx, 13. 

Quartet: Ashlee could also be pictured gathering together influencer Nicole Zajac and Luna Bronze co-founders Maddy Balderson and Rhiannon Mitchell for a group shot

By the way: Evan was wearing the same smock-like white top and high-cut black trousers he modeled later that night when he and Ashlee swung by another party