Tubthumping - Chumbawumba.
I hate everything about it.
Lots of Runners-up, though:
Laffy Taffy - D4L
A Thousand Miles - Vanessa Carlton (UGH!)
Stole - Kelly Rowland
Check On It - Beyonce
Girl - Destiny's Child
Hollaback Girl - Gwen Stefani
Everything that Staind has released. That lead singer irks me to no end.
Everything (except My Happy Ending) by Avril Lavigne
Hit 'Em Up Style - Blu Cantrell
Everything released by Good Charlotte. Gah, I hate them!
Not A Girl, Not Yet a Woman - Britney Spears
Overprotected - Britney Spears
Everything by Clay Aiken
What a Girl Wants - B2K
One Wish - Ray J.
The Jump Off - L'il Kim
I'm Sprung - T-Pain
I'm In Love With A Stripper - T-Pain (Yeah, I think he sucks.)
Rompe - Daddy Yankee
Obsession (No Es Amor) - Frankie J/Baby Bash
Switch - Will Smith
Because I Got High - Afroman
Sole Survivior - Young Jeezy/Akon
Mambo No. 5 - Lou Bega
Everything by Backstreet, N'Sync, O-Town, 98 Degrees, and every solo effort of each of these persons.
Everything by Jessica Simpson. She can't sing and she should be arrested for every time she is within 5 feet of a microphone. Period.
Pretty Fly For A White Guy - The Offspring
1985 - Bowling For Soup
Dreams - The Game
Still On It - Ashanti
Baby I Love U - Jennifer Lopez
Everything by Sean Paul. He seems like fake Jamaican reggae to me.
I could go on all day, folks.