Another One Rides the Bus in my pants.
Still Haven't Found What I'm Looking For in my pants.
The Hampster Dance in my pants. (Hampton the Hamster)
Love Is A Battlefield in my pants. (Officer [Pat] Benatar, of the Sky Raiders)
Under the Sea in my pants.
Your thoughtful Sasami avatar made me hunt down another song...
No Need For Tenchi in my pants. 
(the opening theme from the TV series - Tenchi Universe on Cartoon Network)
Boy, do I agree with that statement.
Rock Lobster in my pants.
here's a differant thought.
The Load Out In My Pants - jackson browne
ok .. a few more befor other steal 'em
first, for the girl you DON'T like ..
She's like the wind in my pants.
&
Ride like the wind in my pants
As always, late to the party...still
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A Whole New World in my pants
I Need a Hero in my pants
Flight of the Valkyries in my pants.
ya know .. we're missing a golden oppertunity here ...
christmass song's
jingle bells in my pants
silver bells in my pants
rudolph the red nose raindeer in my pant
joly old saint nicolas in my pant
Pretty Fly for a Rabbi in my pants.
beat it in my pants
Rainbow Connection in my pants.
Bad Medicine in my pants
Walk This Way in my pants
Well, seeing as how people are posting more than one song title now, I'll throw a few in here.
Head Like a Hole in my pants (NIN)
We're Not Gonna Take It in my pants (Twisted Sister)
Poundcake in my pants (Van Halen)
Little Sister in my pants (Queens of the Stone Age)
Amish Paradise in my pants (Weird Al)
Almost in my pants (bowling for soup)
God Hates Us All in my pants. (Slayer)
The Night Santa Went Crazy in my pants.
Weapon of Choice in my pants.
All Alone With You in my pants.
Closing Time in my pants.
I would do anything for love, but i wont do that in my pants
Another One Bites the Dust in my pants.