Justin Bieber and Selena Gomez gatecrash wedding in LA

Justin Bieber had his photograph taken with the bride and groom

Justin Bieber has gatecrashed a wedding in California, after reportedly hearing one of his songs being played.

The Canadian singer is said to have been walking along a beach in Malibu with girlfriend Selena Gomez on Saturday night when they walked into Rob and Jeanine McCool's reception.

After gatecrashing the wedding, he tweeted to say: "WEDDING CRASHERS last night! hahaha. too funny. crazy story."

The newly-weds also had their photo taken with the teenage star.

A video of Justin Bieber congratulating the bride and groom has since appeared online.

In it, the 17-year-old is heard saying: "What's up everybody? We just crashed it. We didn't really know what was going on.

"We heard a party so we decided to just come. So, let's party."

A numbers of guests can be heard shouting, "Oh my god, it's Justin Bieber" repeatedly in the background.