Bruce Springsteen: 'Lady Gaga wants you to play on her album'

Clarence Clemons remembers being stunned when about three weeks ago he got a call from Lady Gaga. This time, they exercise machine in his home in Florida was to install.

According to the Rolling Stone that Bruce Springsteen tells, "They (Gaga's aides) said to me, 'Lady Gaga wants you to play on her album.' This is on a Friday afternoon at 4 p.m. I said, 'When do you want me to do it? I'm free Monday or Tuesday.' "They go, 'No, she needs you right now in New York City'."

He gave up everything and heading for the airport: "I almost got a ticket I drove so fast." He arrived at her studio around midnight. "She came running down the hall," he says. "She was like, 'Big Man!'"

He wound up performing sax on her upcoming song Hair. And he's glad he made the trip. "It was wild. I was so excited. I'm a Gaga-ite."

Casey: 'Springsteen collaboration surreal'

Bruce Springsteen on the track 'Peg O' My Heart' was surreal,Dropkick Murphys singer-bassist Ken Casey has professed collaboration.

Its a dream come true for me to record with the 20-time Grammy winner says the musician to Billboard.

"I still can't believe he actually sang on our record - it's pretty great," he said.

Casey said that he like Springsteen's humility.

"He's down to earth," the rocker remarked. "For every minute you want to pinch yourself because he's on your record, the next part of you that knows him says, 'Well, why wouldn't he?' because he's just a regular guy."