Ashlee Simpson poses with mother-in-law Diana Ross as she and Evan Ross spend Halloween with kids

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Ashlee Simpson took to Instagram after Halloween to share a photo of her family's celebration of the holiday.The mom-of-three 38, sported a bright blue bob-cut wig as she posed with husband Evan Ross, 34, and legendary mother-in-law Diana Ross, 78.Evan also shared the outtake to his respective account with the caption: 'HAPPY LATE HALLOWEEN.' Ashlee Simpson took to Instagram after Halloween to share a photo of her family's celebration of the holidaySimpson, who made a name for herself as a pop music artist in the early 2000s, matched dark lipstick to her bold hair.She wore a sleeveless multicolor turtleneck and deep blue, loose-fitting pants as she held her youngest child, Ziggy, two, on her hip.

The blonde beauty and her beau also share daughter Jagger, seven, and she shares son Bronx, 13, with ex husband Pete Wentz.The family posed outdoors with a gorgeous pink and blue sky providing a backdrop as the sun set.

Family: The blonde beauty and her beau share daughter Jagger, seven, son Ziggy, two, and Ashlee also has son Bronx, 13, with ex husband Pete Wentz Diana joined the family photo-op in black leggings and a black shirt layered underneath a long sweater.Her dark, voluminous curls hair framed her face as she stood next to Evan, who was dressed as a miner for the fun and spooky day.The couple's daughter wore a blue wig like her mom, but hers was much longer and she teamed it with metallic silver pants.Days ago Ashlee, whose older sister is Jessica Simpson, appeared online to mark Ziggy's birthday.

Birthday boy: Days ago Ashlee, whose older sister is Jessica Simpson, appeared online to mark Ziggy's birthdayShe uploaded outtakes from the tot's special day and wrote in the caption, 'Happy birthday Ziggy Blu can’t.