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Let's be honest: Australian singer-songwriter Sia could have just retired after releasing 2004's "Breathe Me" (AKA the Six Feet Under song), because that track is flawless and timeless (IMHO). But thankfully, she's gone on to write and record not only her own music but some pretty major collabos—David Guetta's "Titanium" and Flo Rida's "Wild Ones," anyone? Songs of the summer!

Sia announced via Twitter yesterday that she's teaming up with Christina Aguilera for the track "Blank Page" to be featured on Xtina's upcoming album, Lotus, due out in November. Sia tweeted, "So @TheRealXtina Sounds amazing on our next collaboration. Blank page. Squeeeeee." Sia and Xtina also hooked up for Aguilera's Bionic track, "You Lost Me," which was one of the most well-received tracks from the album.

Check out a clip of "Blank Page" below, and all hail queen Sia.