Pop superstar Beyonce has unleashed a never-before-released studio version of country artist Lee Greenwood's classic anthem 'God Bless the USA' to assist the New York Police and Fire Widows' and Children's Benefit Fund.

Both Beyonce and Greenwood have agreed to donate all proceeds from the single to the charity organization. "I cannot think about anything more appropriate to do to help these families," says Beyonce in a press release.  "Almost 10 years later, it is still so painful for all Americans, especially those who lost loved ones."

Beyonce, who had previously performed the song live, never released her studio version of 'God Bless the USA' until it premiered Thursday night on CNN's 'Piers Morgan Tonight.' The onetime Destiny's Child singer offers a soulful rendition of Greenwood's patriotic tune, while staying true to the original.

According to the press release, the timing of the single is in conjunction with "recent news events and the re-opened wounds of 9/11 families," alluding to the slaying of Osama Bin Laden. The benefit track is available exclusively on iTunes.

Listen to Beyonce's Version of 'God Bless the USA'

Listen to Lee Greenwood's Original Version of 'God Bless the USA'