Beyonce and Kelly Rowland shocked a group of girls at a karaoke bar when they dropped in on their party on Tuesday (07Jan14).

The best friends and former Destiny's Child members visited the Sing Sing karaoke bar in Miami, Florida along with Beyonce's husband Jay Z, their former bandmate Michelle Williams and Timbaland, and were ushered in to a Vip room, but Beyonce and Rowland couldn't resist taking a tour of the place.

Owner Kellie Pilicer tells Miami's New Times, "Beyonce follows the sounds, she just walks right in, and there are two girls sitting and one of their friends had fallen asleep on the lounge chair... I'm standing there watching this whole thing and the other people in their party started walking in and cracking up because they were singing Beyonce.

"They start dancing together, but they have no idea who it is. And all of a sudden one of the girls looks at Kelly and says, 'Oh, you look like Kelly Rowland,' and then she looks at Beyonce and goes, 'Oh my god!'"

The singers posed for pictures with the other patrons, including the sleepy reveller who was snoozing on a couch during the whole encounter.