(Cover) - EN Showbiz - Justin Bieber "crashed" a wedding over the weekend, according to reports.

The Canadian singer, 17, and his Disney star girlfriend Selena Gomez were enjoying a romantic dinner date on Malibu beach when they heard Justin's hits playing at a nearby wedding.

According to a source, the pair, who were taking a stroll along the beach at the time, decided to "crash" the celebrations after hearing the chart-topping song.

Justin was "cool enough to make a cameo, which surprised all of the wedding guests," the source said.

"He even took the microphone, congratulated the newlywed couple, and said a few nice words, while posing for a series of pictures with his fans," the insider added to PerezHilton.com.

Justin's unexpected antics surprised all of the guests at the party, most of all the thrilled newlyweds. The star's appearance at the Malibu wedding with Selena at his side was said to be the icing on the cake for the recently married couple.

"That was one of the coolest and nicest things a person of his celebrity can do, and it certainly made a memorable night for the newlywed couple Mrs. and Mrs. Rob and Jeanine McCool," the source added to the website. (C) Cover Media