Last year, we ran a super-sized competition to determine the greatest pop song in modern history, from the ’80s to today. Now, we’re back — and this time, it’s all about honoring the best and boldest in music videos.

We're back at it with the next round of the '00s — and it's a showdown between Mother Monster and the Moulin Rouge. Let's explore, shall we?

The ladies of Moulin Rouge theme "Lady Marmalade" easily crushed Rihanna's "Umbrella," storming through with an impressive 82% of the vote. Evidently, more than a few people still want to voulez vous with Christina Aguilera and crew. But will it be enough to lead them past this week's round?

On the other hand, Lady Gaga and her Fame Monster mega-monster of a pop smash soldiered right through a diva-sized battle with Beyonce and her "Single Ladies," scoring an even bigger lead — a whopping 85% of the vote, to be exact. But will her Little Monsters support her as strongly in this next round?

It's time to decide: Is the better video "Lady Marmalade"? Or is it "Bad Romance"? You can vote once per hour now until December 7 at 5 PM ET!

And don't forget to vote in the other '00s semi-final round...

Christina Aguilera, "Dirrty" vs. Britney Spears, "Toxic"

Classic Pop Disses By P!nk + More Stars:

Lady Gaga + More Stars Open Up About Their First Time: