When Justin Bieber, Selena Gomez Mixed Kisses and Drinks at Birthday Bash [PHOTOS]

Justin Bieber and Selena Gomez have often been spotted cozying up to each other in public. However, the couple may have taken things a wee bit far, with pictures of a presumably drunk Bieber kissing his ladylove cropping up on the Internet.

The teen heart throb celebrated a belated birthday Friday, with Gomez apparently glued to his side. As is customary, the cute couple indulged in PDA, with Bieber often photographed planting kisses on the former Disney star, the Daily Mail reported.

From the looks of it, the music duo looked quite relaxed and happy. However, some fans have pointed out Bieber's sloppy poses as well as Gomez's exuberance in a couple of snaps, thereby leading to the belief that alcohol may have been flowing in the party.

The publication also noted that Gomez and her man were seen spending time with their shared agent, Nick Styne, who's often seen in the photos.

If the couple was indeed drinking, it's quite likely that they could come under much criticism, especially after they jointly announced their decision to abstain from alcohol and drugs, celebs.gather.com said. The celebrity Web site also revealed in a poll that nearly seventy percent of fans who've seen the photos believe that the couple was drunk. Also, both Gomez and Bieber aren't yet at the legal age to drink. Bieber turned 18 March 1 while Selena is almost two years older

Meanwhile, the party was a huge success, the Web site said. A-list stars, including Ashley Tisdale, Alfredo Flores, several members of the Kardashian clan and other handful of names were reported to have partied that night. Gomez looked stunning in a in a red strapless gown while Bieber appeared dapper in a checkered jacket.

The Disney starlet rushed from Florida, where she is currently filming for her Spring Breakers movie, to be with Bieber in Los Angeles for his birthday.

Click here to view a couple of pictures of the two stars from the party.