Justin Bieber Kissing GIFs: 'Under The Mistletoe' Co-Star Vs. Selena Gomez

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Justin Bieber's been giving his make-out muscles a workout lately. One minute he's kissing his girlfriend Selena Gomez, and the next he's totally swapping spit with his female co-star on the set of his "Mistletoe video," the first single off Justin's upcoming Christmas album, Under the Mistletoe.

Thankfully these two make-outs have been caught on film, so it's our pleasure duty to do a little compare and contrast via a little something we like to call: "The Battle Of The Better Bieber Kiss." It is SO on right now, guys.

Let us begin with an in-depth examination of Selena and Justin's kiss: Since this kiss went down at The Billboard Music Award! s, n ot only was it super public, but these two young lovebirds also had to deal with a serious time crunch! If they spent too much time making out, then Justin would lose precious seconds of his acceptance speech, and y'all know he's got a laundry list of peeps to thank. (Usher! Scooter Braun! God! Kanye West!) Additionally, Justin did start off the kiss with a hug, which is not only is a sign of intimacy, but also of mad respect. Yes, I moonlight as a body-language expert on the side, so step back.

Next up is Justin's kiss with his "Under The Mistletoe" co-star. There's already an uneven playing field -- Justin and his leading lady aren't hindered by time and are likely getting step-by-step directions from the video's director. "Put your hands on her face, Justin!" and "Look into her eyes passionately for three seconds!" Totally unfair advantage if you ask us.