Rev Your Engines! Behind the Scenes at Dierks Bentley's Celebrity Motorcycle Ride

The singer rallies his famous friends to help raise money – more than $330,000! – for a great cause

HANG ON, MAMA!

"I almost dropped her – true story!" the singer said of his ride with mom Cathy. "I hadn't ridden this bike in a while and I'm not used to having someone behind me. I was waving to a bunch of folks as we were leaving and I kind of goosed it. She had a light grip on me and I felt her scoot off behind me. I was about an inch away from my 70-year-old mom flying off the back of my bike!"