Throughout his 60-year career, Elton John's celebrity spats and brutal barbed honesty have been well documented.
So, despite his close friendship with Harry, it shouldn't have been surprising when the Duke of Sussex became embroiled in a tense row on the last day of their holiday together with their partners and children.
In his memoir, Spare, Harry recalled congratulating Elton on finishing his memoir, Me, but admitted that the atmosphere soured after the pop legend said that it would be serialised in the Daily Mail.