Singer Chris Brown has voiced his gratitude following his release from prison saying that he is humble and blessed.

The R&B star, who has been behind bars since March, was freed Monday morning. He celebrated his freedom by taking to Twitter and wrote: "Humbled and Blessed."

The singer was jailed earlier this year following his dismissal from a court-ordered rehab stint for bad behaviour, which was part of a probation violation case stemming from his 2009 assault conviction for attacking ex-girlfriend Rihanna, reports contactmusic.com.

He was facing a year behind bars, but received credit for the time he already spent in rehab and in custody. Officials have yet to reveal the reason for Brown's early release.

The 25-year-old is still facing an assault trial in Washington D.C. over allegations he attacked a man during an unprovoked altercation in October, last year.