Regent Street Christmas Lights 2013 Switch On - Pictures Heart's Jamie and Emma were joined by some famous faces at the annual switch on of the city's best Christmas lights! 1. Jamie gets the crowd going. 2. Regent Street gives it some Heart. 3. Mel C joins Emma onstage...! 4. All together now: "I need some love like I never needed love before..." 5. Emma hugs Mel C after the pair get the whole crowd singing the Spice Girls. 6. 3... 2... 1... Go! 7. Toby Anstis gives it some Heart! 8. Hands in the air! 9. Leona Lewis sings songs from her new album 'Christmas'. 10. Mel C and Emma give it some Heart. 11. Leona belts it out with a little help from her friends. 12. Regent Street lights up with an impressive fireworks display. 13. Crowds stare in awe at the incredible fireworks display. 14. Mel C and Emma Spice it up backstage. 15. Passenger wows the crowd with a performance of his hit 'Let Her Go'. 16. Toby makes the Heart hands with Passenger. 17. Eliza Doolittle gives it some Heart. 18. Anastacia poses for a photo with a fan.