Lindsay Lohan gave her first post-rehab interview With Oprah Winfrey, which aired Sunday night on Oprah's Next Chapter segment on OWN.During the candid interview, the Canyons actress admitted she is an addict, and alcohol was her drug of choice.“That in the past was a gateway to other things for me,” said Lohan, who confessed she’s done cocaine 10 to 15 times.