British singer Robbie Williams has justified his decision to wear an X-rated necklace during a performance over the weekend (08-09Jun13), insisting the controversial piece was a gift from his wife.

The Angels hitmaker took to the stage at the Wembley Arena in London for the Capital FM Summertime Ball on Sunday (09Jun13) wearing a necklace bearing the word 'c**t' in pink letters with a small 'R' attached.

The former Take That singer has now revealed the story behind the necklace, admitting the expletive is actually his wife Ayda's pet name for him and she had the jewellery specially commissioned.

Williams tells Britain's The Sun, "Ayda had it made especially for me as her nickname for me is c**t. Mine for her is t**t."