Now that the pain of Ashlee Simpson's acid reflux-induced "Saturday Night Live" blow-up is in the past, the singer hopes that the mourning nation will be able to move on to issues of greater concern, like her January tour. No word on whether Simpson plans to pack plenty of purple pills.

In a letter to her "true fans" posted on her website, Simpson made an effort to set the record straight on the events that led her to storm off the "SNL" stage on Saturday (Oct. 23), just seconds into her performance. At the time, viewers were able to hear backing vocals for a different song, prompting accusations of lip-synching, which have been at least somewhat deflected by the singer's explanation.

"My acid reflux started acting up and I know my real fans know that music and performing is my true passion and you support me for that," she writes. "I couldn't control what happened that day."

Simpson's father-manager-svengali Joe Simpson outed the singer's medical condition on Monday on Ryan Seacrest's radio show.

"Just like any artist in America, she has a backing track that she pushes so you don't have to hear her croak through a song on national television," Joe Simpson explained. "No one wants to hear that."

Simpson lashed out at the critics who have had a field day since the incident.

"People always say things that are hurtful, and I encourage my fans to do what I do and not read what people are saying on the Internet," she says. "In a couple of days everyone's attention will be on someone else."

Immediately following the botched "SNL" act, Simpson blamed the gaffe on her band, but assured fans that the actual musicians in her act don't hate her. Or at least they say they don't hate her, at this time.

"We are all a family and love each other very much -- they are the best guys in the world and I wouldn't want anyone else to be with me at this time," she explains.

Doctors estimate that at least 36 percent of all Americans suffer from at least some form of acid reflux discomfort on a monthly basis, generally after meals and in the form of heartburn. More serious acid reflux can cause coughing and wheezing as well as halitosis, throat soreness and laryngitis.