The woman apparently licking Bono's breast is Edra Blixseth, a disgraced former billionaire who is at the center of a criminal investigation probing whether she made fraudulent representations about her financial worth to a number of banks.

In a scandal set to rock Capitol Hill, RadarOnline.com has learned the image was taken at an out-of-control event four-years-ago, at Blixseth's $75 million Porcupine Creek estate in Rancho Mirage, California.