Pippi Longstocking -- Charged with Hit-and-Run and DUI After Crazy Arrest

Tami Erin -- the actress who played Pippi Longstocking -- has just been charged with 4 crimes in connection with her insane DUI arrest last year ... when she allegedly smashed into 3 cars before cops finally put her in cuffs.

TMZ broke the story ... Pippi was popped in L.A. for felony DUI and hit-and-run back in December. Cops claim she hit one car, drove off, hit another, drove off again, then finally hit a third ... and one person had to be taken to the hospital.

When cops finally found Tami, they gave her a field sobriety test and placed her under arrest. One source said she was completely out of it. Cops say she also refused to give a blood alcohol test.

Now the L.A. City Attorney has officially filed charges against the actress: 1 count of DUI with a refusal, 2 counts of hit-and-run, and 1 count of failure to provide proof of insurance.