No-Show! Andy Cohen Flakes On Justin Bieber After Bombshell Sex Confession

Andy Cohen chickened out on facing no. 1 sex wish-list celeb Justin Bieber this weekend after revealing he wanted to bed the star live on air — and RadarOnline.com Online has all the dirty details on the scandal.

One day before Cohen was supposed to appear alongside best friend Sarah Jessica Parker at a special Justin Bieber holiday concert at Madison Square Garden, naughty quotes leaked revealing that the Bravo host, 48, wanted to have sex with the young Canadian crooner.

Though Andy was happy to talk about Bieber's "adult-sized" penis behind his back, the TV host didn't have the balls to say it to the heartthrob's face!

"Andy just didn't show up," one source backstage at the Jingle Ball concert tells RadarOnline.com. "Andy was supposed to introduce another act and SJP was introducing Bieber."

"Sarah showed up and introduced Bieber, but Andy was a no-show," the insider continued. "Justin is 22-years-old and straight and a 48-year-old gay man talking about looking at naked pictures of Justin and calling him 'pretty' and 'smooth.' It is just creepy. Either Andy was scared about Justin's reaction or scared that the crowd of Justin's fans would have booed him."

As RadarOnline.com previously reported, during an appearance on the Allegedly podcast, Cohen shared sordid details about his sex life to Theon Von and Matthew Cole Weiss — including his Biebs confession.

The Bravo honcho readily revealed he's hot and heavy for the singer, saying: "I think he's really pretty. I like how smooth he is…I saw the d*** pic and I think he has an adult-sized penis."

Cohen admitted that there are likely d*** pics of his own floating around the Internet. But he kept his face out of the nasty shots, he insisted: "You'd never know that it's me!"