(Birthday Kiss Photos) Justin Bieber's PDA-filled 18th Birthday Bash

A horde of celebrities joined pop star Justin Bieber in celebrating his birthday this year, but he only had eyes for his girlfriend, 19-year-old Selena Gomez, who flew in from filming 'Spring Breakers' in Florida, and whom he kept kissing the whole time.

The two walked around by the hand all night. According to a source, Gomez was definitely the best part of the night for the man of the hour, Bieber. He turned 18 on Thursday, March 01, 2012, but the celebration was held the following day.

The surprise party was given to the birthday boy by his mother, Patti Mallette, his manager, Scooter Braun, and his publicist, Melissa Victor at the Regent Beverly Wilshire Hotel. It was joined by Kim Kardashian, Mike Tyson, Kylie and Kendall Jenner, Ashley Tisdale, Cody Simpson and more.

Bieber received a $102,000.00 worth of present from Braun, which was a one-of-a-kind Fisker Karma eco-friendly sportscar. Check out some photos from the birthday celebration above. For more details, visit Yahoo OMG!

For starters, Bieber is a Canadian pop/R&B singer, dancer, songwriter and actor. He has received a number of awards including Artist of the Year at the 2010 American Music Awards. He has also been nominated for numerous awards, including Best New Artist and Best Pop Vocal Album at the 53rd Grammy Awards. The music video of his most famous song "Baby" is currently ranked as the most viewed and most discussed YouTube video.