When Britney Spears’ guest starred on CBS’ "How I Met Your Mother" the appearance pushed the show’s ratings to an all-time high.

No surprise then that another celebrity whose career is in a free fall should end up guest-starring on a series during May sweeps.

You’ve heard it for months, but it was finally confirmed today that Lindsay Lohan will now appear on ABC’s "Ugly Betty."

Lindsay Lohan will appear on the May 22 season finale and possibly five episodes next season, according to Variety. Her first day of shooting was today (Saturday, May 3rd.)

From what we hear, she’ll play a down-on-her-luck old high school pal of Betty Suarez (America Ferrera), who wasn’t very nice to Betty in those days.

The deal was first floated last fall. But a sunny career touch up on a hit comedy series couldn’t have come at a better time for a recovering Lindsay Lohan whose mug shot was recently used in an alcohol industry ad to symbolize those "hard-core" drunk drivers with multiple DUIs.

Good luck, LiLo. Just remember that America is the star, not you.

Update: Gold Derby blogger Tom O’Neil and Gold Derby forum members weigh in on Lindsay’s odds of taking home an Emmy for her work on "Betty" right here.

Photos: WireImage

Posted by:Elizabeth Snead