The following songs frequently get stuck in my head:
I Lost on Jeapordy
The Muppet Show Theme
Rock the Boat
Rainy Days and Mondays
Schools Out For Summer
Somebody Come and Play
Won't You Marry Me Phil?
Lasagna
I Think I'm a Clone Now
A Moment Like This
Since You've Been Gone (the kelly Clarkson song more than the Weird Al song)
Because of You
The theme song from Greg the Bunny
I'm So Glad You Came Into My Life
The Checks in the Mail
Turn, Turn, Turn
the SCTV theme (either theme from the fourth season)
Homer Simpson's version of The Flinstones theme
The Monorail song
Do De Rubber Duck
Rubber Duckie
Airline Amy
Living with a Hernia
A Complicated Song
The Grouch Anthem
Any Person, Place, or Thing
Just the Way You Are (both the original version and the Sesame Street version)
Whenever I See That Smilin' Face
Scotty Doesn't Know
Whenever I Call You Friend
You've Got a Friend (James Taylor's recording)
this one song that I can't figure out the title of... it goes "I can call you my baby boy, you can call me your baby girl..."
This other song that I can't figure out the title of... it goes "Baby, now that I've found you I can't let you go, baby even though, you don't need me, you don't neeed me..."