Linda Flynn-Fletcher (usually addressed and credited as "Mom" or "Mrs Flynn-Fletcher" by Isabella) is the mother of Phineas and Candace Flynn, and the stepmother of Ferb Fletcher. She's the daughter of Betty Jo Flynn and Clyde Flynn. She is married to Lawrence Fletcher. She is a regular American mother although she used to be a one hit-wonder named Lindana ("Flop Starz"), and now plays in a free form jazz band with Isabella's mother and Jeremy's mother ("Jerk De Soleil"). Her anniversary with Lawrence Fletcher is June 15th. ("Dude, We're Getting the Band Back Together")
During the credits of "Flop Starz", a commercial airs for a compilation album called The Essential Lindana: Still Fun.... On the album, the song is advertised as being "remixed and re-translated" into the following languages: Portuguese, Spanish, Italian, Dutch, French, Scottish, Canadian, German, Navajo, Japanese, Latin, Greek, Esperanto, Swedish, Russian, Pig Latin, Tag Log, Samoan, Dog, Korean, Taiwanese, Swahili, Bulgarian, Irish, Icelandic, Australian, Aborigine, Yiddish, and presumably others since the commercial is cut off before "everyone's favorite" language could be named. ("Tag Log" may be a spelling mistake, since a language called "Tagalog" is spoken in the Philippines.)
Linda is played by Caroline Rhea, who describes Linda as having a large, curved waist, and always trying to keep order. Rhea describes that as a Disney mom, Linda never freaks out or gets angry at Candace's rants about her brother's plans, just says in calm voice: "Candace, honey, I think you're crazy." Rhea has done a few other Disney Channel movies, including Mom's Got a Date With a Vampire, and was previously famous for her portrayal as Hilda from Sabrina, the Teenage Witch. She also made two guest appearances in The Suite Life of Zack and Cody, which starred Ashley Tisdale (the voice of Candace).
The Wizard of Oz is among her favorite books. ("Wizard of Odd")
Her cell phone number is 555-0142, excluding the area code which is unknown. This was made known by Candace in "Phineas and Ferb Hawaiian Vacation".
Linda is named after Dan Povenmire's sister.
She had one date with Heinz Doofenshmirtz before becoming a superstar.
She may be addicted to cake. ("Robot Rodeo")
She lip syncs when performing I'm Lindana and I Wanna Have Fun!, which may indicate that her real singing voice is not very good ("Ladies and Gentlemen, Meet Max Modem!"). However, she did sing a spontaneous Broadway musical number at the ending of "Phineas and Ferb Interrupted", possibly implying that she specializes in the genre.
Linda relies on contact lenses to be able to see. ("Last Train to Bustville")
She lives at 2308 Maple Drive, in Danvile USA. ("The Doonkelberry Imperative")
She appears to think of herself as good-looking and beautiful. ("Doofapus", "Norm Unleashed")
During the credits of nearly every episode, Linda is credited as "Mom", possibly as a reference to her always being addressed as "Mom".
In "Face Your Fear" a breif conversation with Jack Johnson reveals that she has a secret background in astrophysics.