Troubled actress Lindsay Lohan has gone back to work just two days after she was released from rehab. The Mean Girls star completed her court-ordered 90-day treatment on Tuesday (30Jul13) and she was subsequently pictured leaving the Cliffside Malibu Rehab Center in California. She has wasted no time getting back to work - on Thursday (01Aug13), she turned out to film a spot guest-hosting Chelsea Handler's late night TV talk show in Los Angeles. Lohan showed off her comedy skills during the taping of Chelsea Lately, and she is also said to have posed for pictures with members of the show's crew backstage after wrapping up her work on set. She subsequently took to her Twitter.com page to tell fans about her fun day at work, writing, "I had such a blast today! Thanks everybody." Lohan's hosting stint on Chelsea Lately will air in the U.S. on 5 August (13). The actress, who was sentenced to a stint in rehab after pleading no contest to charges stemming from a car crash last summer (12), is expected to discuss her recent troubles in a candid TV chat with media mogul Oprah Winfrey, which is due to be broadcast later this month (Aug13).