Justin Bieber has opened up about his personal struggles with self-worth and faith in a heartfelt Instagram message.

He posted that sometimes he feels “too flawed for God to utilise me in this beautiful story of life".

This comes as fans voiced their concerns about his well-being after a series of social media posts suggesting drug use.

The pop star, now 30, has long been open about his Christian faith since his baptism by former Hillsong pastor Carl Lentz in 2014.

In this latest reflection, he reminded his followers that God's grace is not dependent on perfection:

“Yet God uses me (flaws and all) every day. The same way He uses you! Our life is significant. God has a plan for us.”

He continued: “Nothing disqualifies us from experiencing God's good plans for our life… Join me if you want.”

The post follows a now-deleted prayer request from his father-in-law, actor Stephen Baldwin, who shared a video urging Christians to pray for Justin and Hailey.

It called for “wisdom, protection and to draw close to the Lord".

The Biebers have regularly spoken about how faith shapes their marriage.

Hailey told Elle, “It’s the most important part of our relationship, following Jesus together. It’s everything.”

Justin has also said he chose to “rededicate [himself] to God” by waiting until marriage to be sexually active with Hailey.