Inside Lady Gaga's Late-Night 'Born This Way' Session With Clarence Clemons

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LOS ANGELES - AUGUST 11:  Lady Gaga performs at Staples Center on August 11, 2010 in Los Angeles, California.

What Lady Gaga wants, Lady Gaga gets -- just ask Clarence Clemons, longtime saxophonist for Bruce Springsteen's E Street Band.

On a Friday afternoon three weeks ago, the musician was putting together an exercise machine at his home in Florida when a call came that Gaga wanted him in her recording studio stat. He dropped what he was doing, flew to New York, met Gaga at midnight and had a track recorded three hours later.

Clemons told Rolling Stone, "She said, 'We'll put the tape on and you just play. Play from your heart. Play what you feel.' It was all very pure."

Clemons' sax can be heard throughout the "Hair" single, including a solo.

He says he was a Gaga fan prior to working with her and is an even bigger supporter now, "She's the real deal. All the craziness and stuff, there's a purpose to all of it. She has no boundaries. It's a day I'll never forget."

Lady Gaga's Born This Way album will be released in May.