It was a busy week for Justin Bieber. Fresh from his appearance on 'SNL' via a pre-recorded digital short, the teen was in California on Saturday, May 12, to offer his love and support to Carly Rae Jepsen. The Biebs introduced her at KIIS FM's Wango Tango in Carson, where she was co-headlining the event.

He nearly lost his pants in the process, showing a flash of tighty whiteys when his black jeans were hanging dangerously low to the ground. Get a belt, Biebs! We're sure that Beliebers were happy to catch a glimpse of Bieber butt, but this pants problem could have been much, much worse.

Pants malfunction aside, The Biebs, who brought Jepsen to the U.S. by signing her, was met with deafening screams from the adoring crowd.

Bieber asked, "You want me to do it to the host?," when he was about to announce CRJ. He then said, "Carly Rae Jepsen is a girl I found in Canada, she has a song called 'Call Me Maybe.' Have you ever heard it?" Um, yeah we've heard it. It's played on the radio all the time and yes, we sing along.

Unfortunately, The Biebs did not perform or duet with the singer, not even when she performed the smash hit which made him snatch her up in the first place.

We loved how cute and fashionable she looked in a leather miniskirt and flowy top. We wish The Biebs would have engaged in an impromptu jam with her.

Watch Justin Bieber Intro Carly Rae Jepsen at Wango Tango

Watch Carly Rae Jepsen Perform Some of 'Call Me Maybe' at Wango Tango