*Madonna and others. I love Madonna but I can't at people acting like she single handedly gave birth to modern pop culture.

But I think they're all iconic in their own way for each star. How the hell can you measure and compare how "iconic" something is?!

People voting Poker Face... honestly, what is so iconic about it? I just don't get it... other than it just being a good dance song...

Anyway, Baby One More Time is clearly the more iconic song. People don't really remember Like A Virgin like they used to, although the song is a hit at Karaoke bars across the world. Hero is only good for graduation ceremonies and the like.

Baby One More Time had: The iconic belly baring catholic school girl uniform, sending parents and the religious board into a frenzy, creating controversy and excelling Britney into the Pop world. It was her debut, and it is one of the most phenomenally successful pop debuts of all time. The song went #1 in every single country it charted in, people still remember it today, the song is included in dozens of movies ever since it's release, covered by dozens of artists in the studio all around the world, the song is nearing 2x platinum in the USA with digital sales (being released before the digital era). People will continue to remember this, as Britney's career goes on.

Baby One More Time >>>

If only Hero was most popular/iconic Mariah Carey song...
All I Want For XMas Is You is taking a **** all over the other 3 impact-wise and success-wise.
Although, I like the other 3 songs.

Like A Virgin >>>>>>>>> BOMT >>>>>>> Hero >>> Poker Face

LAV > BOMT > PF > Hero

I can't @ BOMT winning. That song is stuck in the late 90's teen pop crave, like wannabe and backstreets
Back, people are only voting it because we grew up in the 90's and it was nostalgic. LAV had more impact.

Sure is the most iconic for Miguel