You know what time it is… time for a battle of the song covers! We’re pitting Ke$ha and Big Time Rush against each other for both their takes on Blur’s “Song 2” a.k.a. “Woo-Hoo.” If you don't recognize it yet, believe us, you will when you hear it.

Chelsea Briggs starts the music battle in today’s Hollywire Hot Minute!

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We heard a tad of Ke$ha’s version since it’s been floating around the web for quite some time now, but today the song was finally leaked in full. About time, right? As usual, she turns the rock tune into the ultimate party song with her signature voice and, of course, her sassy lyrics.

And let’s not forget that Big Time Rush released their version of the song “Windows Down” last summer, which turned out to be a pretty rockin’ summer anthem. In the music video, we got to go on an adventure with the boys involving some sun, some sand, some surfing and yup, driving with the windows down!

Kendall Schmidt of BTR dished on his feelings to Celebuzz, saying, “I’m 21 years old and I would blast this thing day in and day out. So I’m assuming everyone’s going to really enjoy it.”

Which version of “Woohoo” do you prefer?  Ke$ha or Big Time Rush’s?

Let us know your thoughts in the comments below!