Career: Walsh's big TV break came in 1993, when he appeared on the Royal Variety Show. It led to a stint presenting the National Lottery, and he also hosted the game shows Wheel of Fortune and Win, Lose or Draw. After fearing his brand of light entertainment was becoming dated he moved into acting, taking parts in the TV version of Lock, Stock, the soap Night and Day and movie Mike Bassett: England Manager before Coronation Street's bosses created the role of Danny Baldwin for him in 2004. He stayed in Weatherfield for two years before leaving to pursue other projects. He's since appeared in Torn, The Old Curiosity Shop, The Sarah Jane Adventures, Law and Order: UK and SunTrap. He moved back into presenting in 2009 with ITV quiz show The Chase, and is a team captain on Play to the Whistle.

Career: After college she went into modelling, spending 15 months in Japan and 18 months in London. She later became a motor sports correspondent, reporting on motorcycle racing for BBC News. She also appeared on other sports-related programmes, including Wimbledon, The Boat Race, The London Marathon, Royal Ascot and The Great North Run. Perry appeared on the 2002-2003 revival of Treasure Hunt, where she took the 'sky runner' role made famous by Anneka Rice. She also helped to present the 2004 Olympics in Athens. Her other programmes include Housecall, Superstars, City Hospital and Holiday, although she's now best known for The Gadget Show.

Career: Eager to find Ireland's answer to Take That, Louis formed Boyzone, and the rest, as they say, is history. To date, the group has sold more than 25 million records worldwide and netted six number one singles in the UK. Walsh has also presided over the careers of other chart-topping acts, including Westlife, Samantha Mumba, Girls Aloud, Shayne Ward, JLS, Ronan Keating and Shane Filan. He is, of course, best known for appearing as a judge on The X Factor, which he has done since its inception in 2004. He has substituted for Simon Cowell at auditions on Britain's Got Talent and the American version of The X Factor.