Fionna and cake
Cake
Her full name: Princess Fiona Fiona O_O
Marceline Sings the song "I'm Just Your Problem" in the episode of Adventure Time entitled "What Was Missing". The episode was the 10th in season 3, and the 62nd in the series. It aired on September 26 2011.
"If You Were Here" by The Thompson Twins
Fiona Coyne's real name on Degrassi is Annie Clark who is the actress who portrays her.
Cake
Her full name: Princess Fiona Fiona O_O
Burning Low
Fiona Cheeks's birth name is Larissa Kelley.
Fiona Wood's full name is Fiona Melanie Wood.
His name is Marshall Lee and he is the gender swapped vesion of Marceline
Fiona Lewis's birth name is Fiona Marie Lewis.
Fiona Apple's birth name is Fiona Apple Maggart.
Fiona Dolman's birth name is Dolman, Fiona Jane.
Fiona Ferrer's birth name is Fiona Ferrer Leoni.
Fiona Frawley's birth name is Fiona Anne Frawley.
Fiona Crossley's birth name is Fiona Mary Crossley.