Los Angeles - Ashlee Simpson celebrated her 30th birthday with a Christmas-themed party on Friday night.
The singer marked her annual milestone with a winter inspired bash at her home in California with her close friends and new husband Evan Ross.
A source told E! News: "One of Ashlee's best friends threw her a 'Dirty Thirty' Christmas-themed party at Ashlee's place last night."
"They had real snow brought in. Ashlee wore a coat and played in the snow. They had huge candy canes all over, Christmas trees, colourful lights draped around."
Evan - the son of legendary singer Diana Ross - took to his Instagram account after the party to post a picture of his gorgeous wife and her friends sitting in the artificial snow, next to a blow up snowman.
LoadingLast night made it @ashleesimpsonofficial favorite holiday Christmas in California. It was a snowy one. Happy birthday baby.
Jessica Simpson wished her sister a happy 30th on Instagram and shared a snap of her party outfit for the winter wonderland bash.
LoadingHappy Birthday Ashlee! There is no one I believe in more than you. Thank you for inspiring me everyday. I love you!!! #dirty30
LoadingReady to celebrate 30yrs of having the best sister on the planet! Happy Birthday @ashleesimpsonofficial