As far as collaborations go Beyonce topped them all last night when she coaxed Princess Eugenie to sing along to the lyrics of her single Irreplacable at her Mrs Cater world tour at London's O2 arena.
According to the Daily Mirror, the Single Ladies singer unwittingly thrusted a mic under the royal unaware of who she was and encouraged her to join in on the lyrics “to the left, to the left” in front of an audience of 80,000 people.
VIDEO: Beyonce Leaves Princess Eugenie 'Red-Faced After Request For Live Duet During Mrs Cater Concert'
Eugenie was left red-faced after Beyonce's duet request (Tony Clark/WENN)
Eugenie was attending the sold-out gig with Kate Middleton's brother and rumoured new girlfriend Donna Air.
Understandably the 23-year-old was mortified, despite the R&B star encouraging her by miming the catchy words herself, and attempted to sing without making any sound before embarrassingly ducking for cover.
"It was hilarious – Eugenie was on the front row with Kate Middleton’s brother, James, and his new girlfriend, Donna Air, plus designers Matthew Williamson and Patrick Cox," a eyewitness at the concert told The Mirror.
"She was really excitable and filming the whole thing on her iPhone like any other fan.
"Beyonce clearly didn’t recognise her so when it came to Irreplaceable, and the part where she picks on an audience member to join in with her, she simply chose the first woman she could reach."
Unaware of her blunder, Beyonce continued to fill the words for Eugenie, who sources say turned bright red after being put on the spot by the superstar.
"When Eugenie, who had gone bright-red, ducked down, Beyonce was forced to quickly fill in the missing words and find a new, willing victim. All Eugenie’s friends were teasing her about her stage fright for hours afterwards.”
Watch the awkward moment in the vidoe below.
Love Lifes: Justin Bieber & Selena Gomez Hugging, Harry Styles Rumours With Kimberley Stewart, Spenc
Leaving Kristen Stewart Again? Robert Pattinson Spotted Jetting Out Of LA