LiLo is classing it up again...

Lindsay Lohan was booted from the SoHo Grand hotel in Manhattan for "allegedly" pitching a fit because her "boyfriend" Calum "Best" was there with "another woman."

Surprise, surprise, according to Star magazine, LiLo went out partying until 1:30 in the morning and then came back and collapsed in the lobby...pantiless, of course...where she proceeded to writh around in front of her bodyguard and her "friend." The hotel manager had to carry her to her room.

Oh, but that's not all! Later that evening/morning LiLo kept calling Calum's room and getting no answer. So of COURSE, she went to bang on the door - he opened it but was clear "busy" with his "other woman" and slammed the door in LiLo's face.

“She went cuckoo,” says Star's source. “She yelled at him, slammed the door and banged on it some more.”

After a few more "Lohan moments" LiLo was asked to leave the hotel...which she did at 6 a.m.

Oh, and P.S., she's recording another album. So um, that's great.