For my fave, it's gotta be Never Again. #8 peak with over 1.1 million downloads sold in 2007 but virtually no radio support and thus no longevity or recurrent play.

Dope soon to be the next single

AMLT is the most forgettable hit by Kelly

only answer for the monsters should be dope...or maybe judas

Probably Blah Blah Blah for Ke$ha

Judas is iconic though

Madonna - "Rescue Me" (though it's a great song), but one of the few Madonna singles with no video.

Lovegame

edit: jk I forgot about Dope

Dope.

Unconditionally

JK it's probably Waking Up In Vegas.

Inside Your Heaven

Keeps Getting Better

Break It Off and This is Me

Blow

I think Skyscraper is

Dope went top 10?

diary

she has 13 and all of them are memorable