Then there was his sister's hit, Paper Pants ;)

Mark Owen had a minor hit with his Four Minute Pants...

the Pantszone hits:
Love Me For Pants
A Picture of Pants
Father and Pants (pinched from Cat Pants)
And my personal favourite...
The Key to My Pants
I've just realised how sad I am...

Would also like to point out that Love Me For Pants was originally a hit for the Osmonds. Another pinched cover version (though not from the Osmonds) was of course So Take A Look At Me Pants, by Westpants and Mariah "My Girdle's Too Tight" Carey. Then there was 5ive's original hit, When The Pants Go Out.

5ive's original hit was Slam Dunk da Pants. Then you have the short-lived 911's PantsShakin'. Of course, you could chose any song by Pants and Dec