Given all that her family has gone through in the last few weeks, it was time Tallulah Willis had a chance to unwind.
Celebrating her 18th birthday at the Beverly Hills home of her dad Bruce Willis, Tallulah donned a tiara, white tank top and cutoff jean shorts to host a low-key bash for friends Friday.
Though mom Demi Moore -- who was hospitalized January 23 after suffering a seizure -- was nowhere in sight, Tallulah's older sister, Rumer, 23, stopped by for the party. The girls' 20-year-old sister, Scout, is away studying at Rhode Island's Brown University.
Tallulah has been staying with her dad Bruce -- currently expecting his first child with new wife Emma Hemming -- since her mom's medical emergency.
"Things have been strained between Demi and [daughter] Scout and Tallulah for a long time," a source tells the new issue of Us Weekly. "For a while, Ashton [Kutcher] was acting as the primary parent because Demi was so out of control."
As Moore recovers, Tallulah's father has begun to back away from his ex-wife. "Bruce and Emma made a conscious effort to distance themselves from Demi," a family source explains. "She's not a good influence, and Bruce and Emma want to keep things healthy."