Credit: Mitchell/GP/Splash News Photo: Leighton Meester on Location for Gossip Girl on New York City's Upper West Side on July 7, 2011

Gossip Girl star Leighton Meester (Blair) is suing her mother, claiming her mom diverted money Leighton sent to her little brother and used it for plastic surgery, Botox, and hair extensions.

According to the suit obtained by TMZ, Leighton's mom refused to work, but Leighton felt badly for her younger brother Lex, who has severe medical issues. So Leighton sent her mom $7,500 a month so she could provide for Lex.

Read the full story at TMZ.

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