United Kingdom, June 28 -- Heidi Montag has faced an "uphill battle" in the entertainment industry.

The 38-year-old reality star released her second studio album, Heidiwood, in May, but she admits that she still faces a battle for credibility as a musician.

Asked how it feels to prove people wrong, Heidi told People: "It's tricky. It still feels like such an uphill battle.

"It's nice to have come into a different level of support and appreciation. I feel like it's still such an uphill battle ahead.

"There's so much still to be done and to fully cement it, if that makes sense - and not just have it be a moment and have it be more of a career."

Heidi and her husband Spencer Pratt are the driving forces behind her recent success.

And t...