Britney Spears's good friend talks drug and alcohol abuse

Britney Spears's good friend and constant companion Sam Lufti sits down with OK! to clear the air of all the rumors and allegations surrounding the former Mrs. Kevin Federline.

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In an exclusive interview in the new issue of OK!, Sam talks openly about the future and drug and alcohol abuse.

"When the state does eight random drug tests and they all come out negative, that speaks for itself," Sam explains to OK!. "I said five months ago that she doesn't do drugs, and now the judge is saying it."

Sam Lufti reveals why Spears takes multi-hour-long drives around Malibu and Los Angeles. "Sometimes she just doesn't want to deal with the paparazzi," says Sam. "It gets scary out there for her and she decides, 'Alright, I'm just going to go home.'"