Lisa Kudrow brings back Smelly Cat!

WATCH: Lisa Kudrow and Courteney Cox delighted fans by singing the Friends favourite

Lisa Kudrow and Courteney Cox delighted fans at a charity event, by launching into a rendition of everyone's favourite Friends song.

It's up there with Happy Birthday and old-school Christmas Carols. In fact, we're willing to bet that 99 percent of you will know the words. Despite belting out dozens of ditties during the 10 season run of Friends, the musical talent of Phoebe Buffay will always be remembered through the lyrical genius that is Smelly Cat.

And it seems that die-hard Friends fans are everywhere. So much so, that when Lisa and Courteney took to the stage at the Rock A Little, Feed A Lot benefit in LA this week (to introduce guest Cheryl Crow), they actually ended up giving an imromptu performance of their own.

After shouts from the crowd called for 'Smelly Cat,' Courteney laughed and responded: 'Get her a guitar people!'

As a guitar was presented to a stunned looking Lisa within seconds, she asked, 'Is this a setup?' before delighting the crowd by obliging and singing the catchy tune.

Altogether now! Smelly Cat... Smelly Cat...

THINK YOU'RE THE ULTIMATE FRIENDS FAN? TAKE OUR QUIZ AND FIND OUT!

CHECK OUT WHAT FRIENDS CO-STAR MATT LEBLANC IS UP TO...

IS THERE GOING TO BE A FRIENDS MOVIE? READ ON TO FIND OUT!