I don't get the hate for Jason Mraz. He is certainly a lot more tolerable than Mat Kearney, IMHO
My all-00's HFH:
Hinder, "Lips Of An Angel"
Christina Aguilera/Pink/Mya/Lil Kim, "Lady Marmalade"
Mariah Carey, "We Belong Together"
Simple Plan, "Perfect"
Nickelback, "Photograph" (I don't mind them as much as some, but this song is definitely grating)
Madonna, "American Pie"
Miley Cyrus, "The Climb"
Mat Kearney, "Closer To Love" (although it wasn't a mainstream hit, it did chart AAA and HAC)
Michael Jackson, "You Rock My World" (sorry)
Fergie, "Fergalicious"