Carly Rae Jepsen has a pretty sweet life: she's adorable, young, famous and lists none other than Justin Bieber as her boss! There's more to Jepsen than her cute songs and mug, though -- she also has a prankster side to her that Biebs may want to be careful of.

Jepsen say down with MTV's Sway to talk about her upcoming collaboration with Bieber as well as his appearance on 'Punk'd.'

"It's pretty stripped down, it's pretty casual," Jepsen said of her duet with the superstar. "It's pretty intimate."

When asked if it was weird having a younger boss, Jepsen was reflective. "He's such an inspiration no matter what his age," she said earnestly. "He's somebody that I look up to. I think his career is really impressive, and ultimately, the person that he is -- surrounding all this craziness that he's in -- it's pretty amazing that he's so humble and cool."

So how about his 'Punk'd' side? "I haven't seen that side of him myself yet, but I heard he's a bit of a prankster, which is good," Jepsen laughed. "I like that. I'm going to give him a run for his money. I enjoy a prank or two myself. It's on! Watch your back!"

Uh oh. Considering Bieber swears he can't be punked, Jepsen may have just opened a can of worms she'll wish that she hadn't!

Watch Carly Rae Jepsen Talk About Her Duet + Prank War