Antony joined a host of celebrities showing off their vocal talents with the Band of Her Majesty's Royal Marines Scotland at the concert in aid of Manchester's Five Stars Scanner Appeal.
And, with reference to the naval personnel on stage, Antony said: "I've waited all my life to say this... take it away sailor!", before launching into his version of Barry Manilow's Copacabana.
Other stars at Manchester's Bridgewater Hall included former Street stars Shobna Gulati and Scott Wright, actor Will Mellor and Hollyoaks actress Carley Stenson.
Middleton Technology School pupil Hannah Snelton, 15, also got the chance to perform Disney song Part Of Your World after winning the charity's School Star competition.
The event, themed around songs from West End musicals, helped raise hundreds of pounds for the charity, which aims to raise £1m by the end of the year for a scanner for Manchester's new children's hospital.
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