The 28-year-old singer says she feels confident when things go on in her busy life smoothly, reported Daily Mirror.
"I think for me, what makes me confident changes every day ... But generally I would say confidence for me just comes from being really happy.
"And that could be anything down to my environment or being lucky enough to have my muse with me or (hearing) an amazing melody for the first time," she said.
Meanwhile, the 'Summertime Sadness' star, whose real name is Elizabeth Woolridge Grant, believes people should grab every opportunity they can and find the strength within to explore different paths in life.
"I think that being worried about whether or not you're ever going to make money, I think that trips people up a lot.