The 'Ding Dong! The Witch is Dead' song has missed out on the top slot in the official UK charts despite a campaign to promote the song in the wake of Margaret Thatcher's death.
Instead of playing the 51-second song in full, BBC Radio 1's chart show played a Newsbeat report that included a five-second excerpt.
More top news
Scientists concluded 12.5% of cardiovascular deaths could be avoided if more Britons changed their diets.
Chelsea Clinton has brushed off Donald Trump's threat to bring up her father's infidelities in a recent interview.
Sir Tom will be joined on the panel by Oscar-winning actress and singer Jennifer Hudson and rock star Gavin Rossdale.