Career: In 1987, Ross and his friend Alan Marke devised a format inspired by Late Night with David Letterman, and after struggling to find a suitable host, Ross stepped in. The resulting show, The Last Resort with Jonathan Ross, made him a star. Other major projects include his chat shows Friday Night with Jonathan Ross and The Jonathan Ross Show, and his stint as the reviewer of the BBC's Film programme. He's also a massive comic book fan; his first foray into the genre, Turf, was published in 2010. But he's also hit the headlines for various controversies over the years, including the notorious Sachsgate, which involved a prank call made by him and Russell Brand to actor Andrew Sachs in 2008.

Career: Davina started out as a singer (her demo was produced by Eric Clapton) and worked for the Models One agency before securing a presenter's job on Ray Cokes' Most Wanted on MTV Europe. ITV's middle-of-the-night series God's Gift led to the higher profile Streetmate, Don't Try This at Home and Popstars: The Rivals, although she tasted failure with her sitcom Sam's Game, series He's Having a Baby, and her self-titled BBC chat show. She's also fronted Love on a Saturday Night and co-hosted both Sport Relief and Comic Relief. Big Brother remains her biggest hit (she quit after 11 series as host in 2010), but has another hit on her hands with The Million Pound Drop. In August 2013, she began presenting ITV's dancing reality series Stepping Out, and in January 2014 began co-hosting Channel 4 reality series The Jump alongside Alex Brooker. The following month she ran, swam and cycled her way across the UK for Sport Relief.

Career: Ora featured on DJ Fresh's chart-topping song Hot Right Now in February 2012. In the same year, her own first two solo singles, RIP and How We Do (Party), reached number one in the UK, and her self-titled debut album repeated the feat. She's continued to score hits, and in February 2015, she performed the song Grateful, which appears in the film Beyond the Lights, at the 87th Academy Awards. Away from singing, Ora has also appeared in the films Spivs (2004), Fast & Furious 6 (2013) and Fifty Shades of Grey (2015). Earlier this year, she became a coach on the talent show The Voice UK, and more recently took up a place on the X Factor judging panel.

Career: At the age of 17, Lewis decided to leave the BRIT school in order to pursue a career in music. She had begun to write and record her own material, working as a waitress in Pizza Hut to fund her sessions. Aged 18, she landed a lead role in The Lion King in Paris but she had to turn down the part because of a back injury. Lewis later recorded a demo album called Twilight and worked hard to secure a record deal but she never managed to land a contract. As a last ditch effort, she auditioned for the third series of The X Factor, which she won, receiving a £1million contract with Syco Music, Simon Cowell's record label. Her winner's single broke a world record after being digitally downloaded more than 50,000 times in 30 minutes and her debut album, Spirit, entered the UK and Irish charts at number one. Lewis continues to record albums and she sold more than 20 million records worldwide.