Mika, whose debut sold more than five million copies worldwide, has recently become friends with chart topper Lady Gaga.
But he's the first to tell you that trying to compose a chart topper is almost always guaranteed to fail.
Among their best-known songs are their British chart topper Down Down in 1974 and Rockin' All Over The World in 1977.
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Ben Howard's debut album Every Kingdom is at a new personal best, in at number four, while last week's chart topper Les Miserables has dropped four places to number five.
Their 1988 follow up was another chart topper.
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That album later rose to number one, giving the soul singer her first UK chart-topper.
In this case, The Fray performed its chart-topper How to Save a Life while one of many montages played overhead.
But he also entered a little-known, unreleased, song by 70s band Gong that included cows mooing, and it was also rated as a potential chart-topper.
Swedish chart-topper Robyn, US singer Colbie Caillat and soul star India.
His band's single Mechanical Animals was a huge American chart-topper that also placed the band in the UK Top 10 for the first time in 1998.
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Even teenage sensation Justin Bieber's songs are Indonesianised on the show - his chart-topper "Baby" set to a dangdut score resulted in peals of laughter from the crowd watching the show.
Chart-topper Thom, originally from Macduff, Banffshire, and who is now based in south London, is said to have clinched a major record deal after webcasting a series of successful concerts from her basement.
Meanwhile, one of Bieber's support acts - fellow Canadian chart-topper Carly Rae Jepsen - has pulled out of a concert for the Boy Scouts of America because of the organisation's ban on gay members.
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