It's synch or swim for Ashlee Simpson (search) on her second go-round on NBC's "Saturday Night Live." (search)

The vocally disparaged singer will perform this weekend, almost a year after the "SNL" audience heard her voice — singing the wrong song — while she held a microphone at her waist.

Even though lip-synching has been around for years, the incident resulted in Simpson being lampooned as an example of today's style-over-substance culture.

Simpson's manager-father, Joe Simpson, has said she used "extra help" because acid reflux disease had made her voice hoarse.

The 21-year-old singer will perform songs from her upcoming album, "I Am Me," according to Simpson's Web site.