Concert watchers slammed Richie’s “awful” performance and compared it to “karaoke in the pub”.
He was joined at the coronation concert by his fellow American Idol judge Katy Perry, 38, with the pair temporarily replaced on the US show by Ed Sheeran, 32, and Alanis Morrisette, 48, during their time away.
Charles was seen dancing alongside Camilla at the show, which also included a performance by Take That in front of a crowd of 20,000 fans at Windsor Castle, and with millions of viewers in 100 countries worldwide watching the two-hour musical spectacular.
It also featured performances from Paloma Faith, 41, and appearances from famous faces such as Pierce Brosnan, 69, and Stella McCartney, 51, whose dad Sir Paul McCartney, 80, performed at the late Queen Elizabeth’s Diamond Jubilee concert in 2012.
McCartney said the king has spent the last half a century “shining a spotlight on conservation and protecting our planet”.
She added: “His Majesty has been shining a spotlight on conservation and protecting our planet for 50 years now.
“He champions hope and action and in that hopeful spirit on this happy day the work of healing our planet should be and must be the cause that unites us, never the cause that divides us.”
Additional reporting by New Zealand Herald