By Ashleigh Rainbird Is Glastonbury festival going Uptown? Uptown Girl singer Billy Joel has had the odds of him appearing at the June gigs slashed, after revealing he is releasing his first single for 17 years. The 74-year-old star made a surprise announcement that he will release new track Turn the Lights Back On on February 1, which he has co-written with Ariana Grande and Selena Gomez’s songwriters. It will be Billy’s second single since 1993, and the singer is playing a string of live dates over the summer, following his headline slot at British Summer Time Hyde Park last year. Now, he’s …