Stepping into the spotlight for her first television interview since November 2012, Lindsay Lohan stopped by "The Late Show with David Letterman" on Tuesday.

The "Mean Girls" star donned a sleeveless floral dress on stage as she fielded some uncomfortable questions from the talk show host while promoting her new flick, "Scary Movie 5."

During the interview, Dave came right out and asked, "Aren't you supposed to be in rehab right now?" to which Lindsay Lohan replied, "Do you not watch anything that goes on? May 2nd."

After admitting that she'd been in rehab "several" times, LiLo was asked how this would be different. "I’m the happiest when I’m working and the healthiest, and I think [rehab] is an opportunity for me to, you know, focus on what I love in life." she explained, adding, "And I don’t think it’s a bad thing. I think it’s a blessing… and not a curse.”

However, not letting Dave get too pushy, when asked if she had addiction problems, Ms. Lohan quipped, "Now you sound like Dr. Phil." Check out a clip of the interview below and catch "The Late Show with David Letterman" on Tuesday night for the full version.