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9 January 2014, 11:43
The 'XO' singer and her Destiny's Child bandmate joined a trio of girls in their karaoke room for a sing-along.
Beyonce and Kelly Rowland made a couple of fans' night earlier this week when they gatecrashed their karaoke party.
The 'Drunk In Love' singer and close friend Kelly joined Jay-Z and several of their entourage at Sing Sing Karaoke out in Miami Beach on Tuesday (7th January) this week.
But after hearing a couple of girls singing Beyonce's hit 'Party' in a private room, the pair decided to join them and start singing along with the Beyonce fans.
Check out a picture of Beyonce and Kelly surprising the girls below (Credit: Facebook/ SingSing Karaoke):
The girls reportedly didn't realise who they were singing with to start with, until they recognised Beyonce.
"There's no way we could have planet it," karaoke bar owner Kellie Pelicer told the Miami New Times after the evening. "No one had any idea. 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!'
Beyonce launched her brand new self-titled album at the end of December.