The BBC have denied that Diana Ross was miming during her performance at the Platinum Party at the Palace.
Ahead of her UK tour, Ross was the headline performer at the Platinum Jubilee event and closed the show at Buckingham Palace on 4 June.
The BBC have released a statement in response to some viewer criticism of the performance: “Ms Ross sang live throughout her performance and was also supported by backing vocals and a live orchestra and choir.”
There was a moment during the broadcast where Ross stopped singing to blow kisses at the crowd but the backing track containing her vocals carried on playing.
The live audience also noticed that Ross was out of tune during her performance of Chain Reaction.
She was also seen adjusting her belt which contained a monitor. Musicians often use the monitors to hear themselves properly when performing.
Other acts to perform at the Platinum Jubilee event included Ed Sheeran, Elton John and Rod Stewart.
The show marked Ross' first performance in the UK for 15 years.
The former Supremes singer is set to embark on a tour of the UK later this month that has been repeatedly pushed back due to the COVID-19 pandemic.
The tour starts on 10 June at Cardiff Castle and she will also play dates in Birmingham, Manchester, Liverpool, Leeds and London.
Ross will also be performing at Glastonbury at the end of June in the legend slot on the Sunday afternoon before headliner Kendrick Lamar.
Fans will be able to see Ross at The Lytham Festival on the 28 June, where other headliners include Duran Duran, Paul Weller, Snow Patrol and Tears for Fears.
The Upside Down singer will be performing at a number of outdoor concerts at locations such as Longleat and Durham.
Watch below: Stars perform for royals at BBC's Platinum Party at the Palace concert