I'm probably (most definitely) not the only person who does this, but whenever people say certain words, I start singing songs in my head, anything from the Lion King to 70s funk.
Some examples:
You say: Philosophy
I sing: Hakuna Matata
You say: Anticipation
I sing: Carly Simon's song of the same name
You say: Scandalous
I sing: So So So Scandalous
You say: "Let's use our inside voices"
I sing: Quiet Little Voices
You say: the name Veronica
I sing: This Costello song
You say: California
I sing: Rogue Wave's California
You say: "Zoom in a little bit"
I sing: A Childhood Favorite :)
You say: Hero
I sing: SHREK!
You say: Roadtrip
I sing: MORE SHREK!
You say: "Turn it off," it being a light, a computer, whatever.
I sing: The Donnas' Take it Off
You say: "Pass the sweet n' low"
I sing: Ah just guess
You say: "Nice day outside"
I sing: Sunshine by Jonathan Edwards
You say: Fun
I sing: THIS
You say: Toast
I sing: Merry Happy by Kate Nash
AAAAAND now I want cheese toast. Fabulous (there's a song for that word too).