lohantk031512_01_X17230WMcrop.jpgLindsay Lohan claims there was never a fight at The Standard Hotel, but Marisa Dugas claims she was shoved by Lilo last Saturday night. A friend of Dugas is now coming forward ... backing Dugas' claims.

A source tells Radar:

    "A woman that was at the nightclub, saw Lindsay shove Marisa, while she was standing with her back to her. She gave an honest account of what she saw that night, there is no doubt in her mind that it was Lindsay Lohan."

Lohan, who says she was home watching TV when the alleged incident occurred, says the claims are made up.

Dugas' lawyer released the following:

    "There is absolutely no way Marisa or her friend would file a false police report, it's just not who these ladies are. Both are fully aware of the implications of filing a false police report, and it's absolutely disgusting that anyone would suggest they are lying."

The lawyer adds, "Marisa did nothing to provoke Lindsay and she was shoved when her back was turned. She took issue with Marisa talking to a young man that was sitting with a group around Lindsay. Lindsay is blatantly lying, she was most definitely at the club that night."