Linda Flynn-Fletcher

 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").