OKLAHOMA CITY - The Wounded Warrior Project is coming under fire for its use of donation money, millions of which comes thanks to the legendary band KISS. 

So while front men Gene Simmons and Paul Stanley were in town for their restaurant opening, we got their thoughts on the investigation into Wounded Warrior.

Known for the hair, makeup and platform shoes, KISS has used their rock & roll platform for good, fundraising and donating millions for veteran charities, especially the Wounded Warrior Project. But now the charity is under fire for allegedly wasting donation money.

More than 40 former Wounded Warrior employees tell CBS News that the project spends lavishly on themselves with 5-star hotels and restaurants. They also reportedly spend only about 60 percent of donations on veterans.

Other charities are said to spend 90 percent and 95 percent on veterans.

According to tax records, CBS reports the charity spending on conferences went from $1.7 million in 2010, to $26 million in 2014. The KISS band leaders have worked with the charity for years, and they've been following these allegations closely.

"I have to be careful and wait for everything to come out. I think it's imperative that charities give the vast majority of their money to people who you believe it's going to. To mislead the public would be a horrific thing," said Paul Stanley, KISS.

Since the CBS report, Wounded Warrior has said the allegations are false, and they said based on their most recent financial record, over 80 percent of all expenses go to veterans.