LISA MARIE PRESLEY – rocked by a heart-numbing emotional meltdown – turned to Scientology pal JOHN TRAVOLTA to help get her life back on track. The 43-year-old daughter of Elvis Presley buckled under the pressure of trying to revive her music career while risking her health to lose weight plus the stress of raising her 2-year-old twin girls Finley and Harper, insiders say. “All of Lisa Marie’s problems came to a head in a perfect storm of stress – from readying her new CD to her never-ending battle to stay thin and the constant demands of the twins,” a family friend told The ENQUIRER. “After Elvis’ death, she’d vowed to make her daddy proud of her as a performer. But her musical efforts have fallen short.” About two weeks ago, she crumpled emotionally over her music comeback, said the source. “I think Lisa Marie probably knows this album with producer T Bone Burnett is really her last chance for a showbiz hit,” the friend confided. “It’s been six years since her las