Source: My PaperThanks to eight years of increasingly impressive - not to mention diverse - artist line-ups and well-executed operations, Esplanade's annual Mosaic Music Festival has become an anticipated event on the calendar of many a music lover.The proof of that is in the numbers: This year's festival, which boasted a stellar line-up, including British band Elbow and Australia's John Butler Trio, attracted a record 135,000. It was the maiden Singapore show for both acts.And, over the years, the robust 10-day event has consistently brought in "firsts" - one of its greatest strengths.Acts like Jason Mraz and Norway's Kings of Convenience, for example, who first played here as part of the festival, later returned (more than once, mind you) to play more shows.The tradition of firsts continues with Mosaic's ninth edition, which will see several critically-acclaimed acts running the gamut of genres gracing Singapore shores for the first time.Headliners have already been confirmed. Those who will play at the Esplanade's 1,600-seater Concert Hall include Grammy-winning soul singer-songwriter Joss Stone, American multi-instrumentalist Esperanza Spalding, indie-folk outfit Grizzly Bear and post-rockers Mutemath.Veteran Irish-English singer Gilbert O'Sullivan and Malian afro-pop singer Salif Keita will also perform.Playing smaller shows at the Theatre Studio are Canadian electronic artist Grimes and American indie duo Tennis. The Recital studio will host Mouse On The Keys, indie-folk band My Brightest Diamond and Dutch singer Wouter Hamel, among others.Next year's line-up, as with previous ones, is meant to celebrate the diversity of music, Esplanade's assistant director of programming, Mr Clarence Yap, told My Paper."We want to move our festival towards presenting alternative forms of music - the kinds of artists and genres that audiences here would not otherwise be able to enjoy," he said."We need to be able to find the right balance (in) featuring these kinds of artists, and getting an audience for them."He added that about five more acts are likely to be announced in early January.Music lover Simon Leong, 26, who has been a Joss Stone fan since her 2003 debut, called next year's line-up "refreshing".The sales executive said: "Joss' gig has been a long time coming. The headlining acts are not necessarily super-mainstream, but they are recognisable... I think there's something for everyone."