Justin Bieber's underwear ads mocked on 'Saturday Night Live'

NEW YORK, Jan. 18 (UPI) -- Saturday Night Live aired a parody of what it imagines the photo shoot was like for Justin Bieber's recent Calvin Klein underwear ads.

SNL regular Kate McKinnon channeled the 20-year-old pop star in the video, which shows Bieber alternately trying to seem mature and serious, even appearing to pray at times, then awkwardly mauling a model played by Cecily Strong and acting like a juvenile prankster.

"I'm a big boy now. ... I'm not supposed to drink, but I do," he confessed as the bored-looking model holds a child's juice box for him.

The clip also features the Bieber stand-in wearing tight, white boxer briefs that say XXS, a nod to speculation suggesting his muscles and covered genitals were airbrushed to look larger in the ads' images.