Lindsay Lohan's friends visited her for the first time in rehab on Sunday -- and we're told they brought along a few special outfits just for the occasion ... Halloween costumes!
We're told English socialite Victoria Hervey and LiLo's rumored lady friend Eilat Anschel teamed up with Dina to spread some Halloween cheer -- bringing costumes to Betty Ford so they could all play dress up ... and Lindsay had a blast.
Sources close to the actress tell TMZ, “Lindsay is doing incredibly well and making amazing progress." Another source adds, “She seems so much stronger and confident.”
No word on the exact costumes she tried on -- but we're guessing they all involved Lindsay misrepresenting herself.