Ashlee Simpson Celebrates Her 30th Birthday with Sister Jessica!

Ashlee Simpson takes a break from birthday festivities for a breath of fresh air on Friday night (October 3) in Studio City, Calif.

The newly 30-year-old entertainer was joined by husband Evan Ross and friends for her big birthday.

PHOTOS: Check out the latest pics of Ashlee Simpson

Also celebrating with Ashlee was her sister Jessica who sported a silver masquerade mask that was all makeup.

“Ready to celebrate 30yrs of having the best sister on the planet! Happy Birthday @ashleesimpsonofficial,” Jessica captioned a picture of herself on her way to the party.

15+ pictures inside of Ashlee and Jessica Simpson celebrating…