updated 04/10/2013 AT 10:10 AM ET
•originally published 04/09/2013 AT 7:25 PM ET
“To be honest, I’m happiest when I’m working – the healthiest,” she said Tuesday night on The Late Show with David Letterman. (Watch the full interview below.)
“I think this is an opportunity for me to focus on what I love in life. And I don’t think it’s a bad thing. I think it’s a blessing.”
Lohan, 26, escaped a jail sentence last month when she reached a plea agreement in a lying-to-police case that calls for three months in a locked-down rehab facility, starting May 2.
Appearing on Letterman to promote the film Scary Movie V and the TV show Anger Management, Lohan got a warm reception from the audience despite a couple of awkward moments when she bristled at Letterman’s questions or simply refused to answer them.
When Letterman asked, “How many times have you been in rehab?” The obviously uncomfortable Lohan answered only, “Several.”
“And how will this time be different?” he continued. “What are they rehabbing, first of all? What is on their list? What are they going to work on when you walk through the door?”