AceShowbiz -

Lindsay Lohan had her first interview in five months on "Late Show with David Letterman". Lohan apparently thought that she would appear on the show to promote her latest movie, "Scary Movie 5", in which she plays alongside Charlie Sheen. In a preview video released by CBS, she didn't expect host David Letterman would bring up questions about her court-ordered stint in rehabilitation.

"Three months," Lohan replied when Letterman asked her how long she would be in rehab. When the host asked again how many times she had been in rehab, the 26-year-old actress answered, "Several." Lohan started to look uncomfortable when the host asked her how the upcoming rehab would be different. She said, "We didn't discuss this in the pre-interview."

Lohan then went on to explain that she viewed rehab as a "blessing." She told Letterman, "No, I think, to be honest, I'm the happiest when I'm working and the healthiest, and I think this an opportunity for me to, you know, focus on what I love in life. And I don't think it's a bad thing. I think it's a blessing... and not a curse."

Letterman went on asking her if she felt she had an addiction problem. "Now you sound like Dr. Phil," she said and recalled, "We have discussed this in the past." Letterman responded, "See, I'm the one who's having the blackouts. I ought to be in rehab."

"Late Show with David Letterman" featuring Lohan will air on Tuesday, April 9.