We're just four days away from the release of 'For You,' Selena Gomez's greatest hits album, but it seems like the Internet couldn't wait any longer to hear her newest track, 'Do It.' And trust us: It's Selena Gomez like you've never heard her before.

It's clear that the 'Rudderless' actress is opening up in her music more candidly than ever, releasing the emotional, heart-wrenching 'The Heart Wants What It Wants,' which courageously detailed the difficulties of her relationship with Justin Bieber. But 'Do It' is rocking a decidedly different vibe -- and it's pretty hot.

"Sittin' on my bed with just your T-shirt on, turning up the volume to my favorite song," Selena sings on the opening verse. "Boy, I can't lie, what we did last night / You know it's constantly replaying, staying on my mind."

While those lyrics are pretty much what we'd expect from a song called 'Do It,' they definitely add a more adult edge to Selena's music. She's been pretty honest about how much growing and changing she's done this past year, and we're loving that her new music is reflecting that.

'Do It' is sexy, upbeat, confident -- and yes, maybe a little surprising. Listen to the chorus:

"If I had a choice, if I had my way / Boy you know we'd do it every single day," Selena sings. "If I had a wish and If i had my way / Boy you know we'd do it every single day." Work it, girl!

Selenators, you can listen to 'Do It' over at Perez Hilton -- and you can pre-order 'For You' right here.

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