LANCE Bass has found love with a hot trainer, but there's a catch - the muscle-bound hunk is married. Bass stepped out with personal trainer and aspiring actor Sebastian Leal at a Malibu party recently, confirming rumors that they're an item. But Page Six has learned that Leal, who is Italian but was born and raised in Brazil, married US citizen Jessica Gannon nine years ago - and never got a divorce. The two separated three years ago, due to what Gannon told us through a rep were "irreconcilable differences." She added, "We continue to love each other. He was, is and always will be my best friend." One pal of Bass and Leal told us the news will be no shock to Bass because "Lance and Sebastian are very open with each other and have no secrets." A rep for Bass, who contacted Leal as well, declined to comment.