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Selena Gomez outside BBC Radio One at the Celebrity Sightings in London with Selena Gomez at London England. (Footage by WireImage Video/GettyImages)
Selena Gomez outside BBC Radio One at the Celebrity Sightings in London with Selena Gomez at London England. (Footage by WireImage Video/GettyImages)
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Selena Gomez outside BBC Radio One at the Celebrity Sightings in London with Selena Gomez at London England. (Footage by WireImage Video/GettyImages)
Selena Gomez outside BBC Radio One at the Celebrity Sightings in London with Selena Gomez at London England. (Footage by WireImage Video/GettyImages)
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Selena Gomez outside BBC Radio One at the Celebrity Sightings in London with Selena Gomez at London England. (Footage by WireImage Video/GettyImages)
Selena Gomez outside BBC Radio One at the Celebrity Sightings in London with Selena Gomez at London England. (Footage by WireImage Video/GettyImages)
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Selena Gomez (r) outside BBC Radio One at the Celebrity Sightings in London with Selena Gomez at London England. (Footage by WireImage Video/GettyImages)
Selena Gomez (r) outside BBC Radio One at the Celebrity Sightings in London with Selena Gomez at London England. (Footage by WireImage Video/GettyImages)
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Selena Gomez outside BBC Radio One at the Celebrity Sightings in London with Selena Gomez at London England. (Footage by WireImage Video/GettyImages)
Selena Gomez outside BBC Radio One at the Celebrity Sightings in London with Selena Gomez at London England. (Footage by WireImage Video/GettyImages)
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Gary Barlow
BBC RADIO 1'S LONGEST SHOW EVER FOR COMIC RELIEF - Gary Barlow arrives as a guest.. Gary Barlow at BBC Radio One Studios on March 17, 2011 in London, England (Footage by WireImage Video/Getty Images)
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SIGHTED: Larry Lamb
Larry Lamb leaves Radio Two after talking about his new book 'Mummy's Boy' SIGHTED: Larry Lamb at BBC Radio Two Studios on March 03, 2011 in London, England (Footage by WireImage Video/Getty Images)
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Exclusive - Laila Rouass
Laila Rouass sighted at Radio One promoting the hit BBC show 'Spooks' which she has recently joined. Exclusive - Laila Rouass on October 16, 2010 in London, England (Footage by WireImage Video/Getty Images)
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Robbie Williams and Gary Barlow
Sightings London: Robbie Williams and Gary Barlow at BBC radio one, London at the Celebrity Sightings in London at London England. (Footage by WireImage Video/GettyImages)
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Robbie Williams and Gary Barlow
Sightings London: Robbie Williams and Gary Barlow at BBC radio one, London at the Celebrity Sightings in London at London England. (Footage by WireImage Video/GettyImages)
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Luke Roberts
who plays registrar Joseph Byrne in BBC's 'Holby City' leaves ITV Studios after appearing on ITV's Daybreak Luke Roberts on January 10, 2011 in London, England (Footage by WireImage Video/Getty Images)
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SIGHTED: Olly Murs
Olly Murs leaves BBC Radio Two Studios SIGHTED: Olly Murs on March 04, 2011 in London, England (Footage by WireImage Video/Getty Images)
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SIGHTED: Barry Manilow
Barry Manilow arrives at BBC Radio Two Studios SIGHTED: Barry Manilow at BBC Radio Studios on March 11, 2011 in London, England (Footage by WireImage Video/Getty Images)
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SIGHTED: Nicole Scherzinger
Nicole Scherzinger leaves BBC Radio Two Studios SIGHTED: Nicole Scherzinger on March 04, 2011 in London, England (Footage by WireImage Video/Getty Images)
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SIGHTED: Nicole Scherzinger
Nicole Scherzinger arrives at BBC Radio Two Studios SIGHTED: Nicole Scherzinger on March 04, 2011 in London, England (Footage by WireImage Video/Getty Images)
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SIGHTED: Jessie J
Jessie J arrives at BBC Radio Two Studios SIGHTED: Jessie J on March 04, 2011 in London, England (Footage by WireImage Video/Getty Images)
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SIGHTED: George Michael
George Michael arrives at BBC Radio Two Studios SIGHTED: George Michael on March 04, 2011 in London, England (Footage by WireImage Video/Getty Images)
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SIGHTED: George Michael
George Michael leaves BBC Radio Two Studios SIGHTED: George Michael on March 04, 2011 in London, England (Footage by WireImage Video/Getty Images)
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SIGHTED: Annie Lennox
Annie Lennox arrives at BBC Radio Two Studios SIGHTED: Annie Lennox on March 04, 2011 in London, England (Footage by WireImage Video/Getty Images)
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Andi Peters
BBC RADIO 1'S LONGEST SHOW EVER FOR COMIC RELIEF - Andi Peters arrives as a guest Andi Peters at BBC Radio One Studios on March 17, 2011 in London, England (Footage by WireImage Video/Getty Images)
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Chris Moyles
BBC RADIO 1'S LONGEST SHOW EVER FOR COMIC RELIEF - Chris Moyles 28 hours into his show Chris Moyles at BBC Radio One Studios on March 17, 2011 in London, England (Footage by WireImage Video/Getty Images)
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Jon Culshaw
BBC RADIO 1'S LONGEST SHOW EVER FOR COMIC RELIEF - Jon Culshaw arrives as a guest Jon Culshaw at BBC Radio One Studios on March 17, 2011 in London, England (Footage by WireImage Video/Getty Images)
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Outside GV
BBC RADIO 1'S LONGEST SHOW EVER FOR COMIC RELIEF - Outside general view Outside GV at BBC Radio One Studios on March 17, 2011 in London, England (Footage by WireImage Video/Getty Images)
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Chris Moyles
BBC RADIO 1'S LONGEST SHOW EVER FOR COMIC RELIEF - Chris Moyles arrives to start the show Chris Moyles at BBC Radio One Studios on March 17, 2011 in London, England (Footage by WireImage Video/Getty Images)