Ever since Carly Rae Jepsen's hit "Call Me Maybe" blew up big, there have been countless lip-dub videos of the tune featuring everyone from Katy Perry to James Franco to the Miami Dolphin Cheerleaders to Barack Obama. But Carly says her favorite "Call Me Maybe" viral video will always be the original.

"There's been some pretty crazy ones… but I think there's always going to be something special about what Justin [Bieber] and Selena [Gomez] and Ashley Tisdale and the guys from Big Time Rush did," she tells Billboard magazine.  That lip-dub clip, posted back in February, was the one that kicked off the whole craze, and it's since received more than 43 million views on YouTube.  And the funny part is, Justin didn't even tell Carly he'd done it.

"I remember watching it thinking, 'That guy looks a lot like Justin Bieber.  Wait a second…that is Justin Bieber!  Holy crap!'" Carly laughs.  "And then that was the moment where I was like, 'What is happening?' Literally it was like pressing the 'Go' button, and since then my life has literally changed in every way."

In other Carly Rae news, she tweeted over the weekend that she was headed for a songwriting session with "We Are Young" hitmakers fun.