Lindsay Lohan sweater sunglasses purse the four seasons blonde rehab

Isn't the 24-year-old starlet supposed to be staying out of trouble?!

In Lindsay Lohan's defense, she could have just been attending a meeting at the Four Seasons Hotel in Beverly Hills, but sources tell X17online exclusively that Lilo spent the night there with some friends over the weekend. Let's hope these are sober friends who have more of an interest in books and TV than taking shots of Patron and playing with other uh, party favors!