Ellie Goulding: After releasing 2010 debut 'Lights' to positive notices in the U.K., the British singer enhanced her profile by performing Elton John's 'Your Song' at the wedding reception of Prince William and Kate Middleton. The album's U.S. release in March 2011 spawned the No. 2 hit 'Lights.' Sophomore album 'Halcyon,' issued in October, earned enthusiastic reviews and entered 'Billboard' at No. 9.