Rock Grads

Sir Paul McCartney, left, holds a pennant presented to him as he walks in the academic procession to the Yale University Commencement ceremonies in New Haven, Conn., Monday, May 26, 2008. Davenport is one of the 12 residential colleges which Yale undergraduates live in. (Bob Child, AP Photo)

Jazz trumpeter Wynton Marsalis plays during commencement at Rutgers University in Piscataway, N.J., on Thursday, May 22, 1997. Marsalis is scheduled to receive an honorary Doctor of Fine Arts degree from Rutgers Newark in Newark, N.J., later in the day. (Mike Derer, AP Photo)

Dublin-born musician and humanitarian Bob Geldof poses for a photograph at University College Dublin's 150th anniversary celebrations where he received an honorary degree, Thursday June 16, 2005. The former Boomtown Rat revealed that more Live 8 concerts in Tokyo, Toronto and Johannesburg will be announced tomorrow. (Cathal McNaughton, AP Photo)

Yusaf Islam, formerly known as Cat Stevens, speakes as he is awarded an honorary doctorate from the University Of Gloucestershire in recognition of his humanitarian work, at The Centaur, Cheltenham Racecourse on November 4, 2005 in Cheltenham, England. (Photo by Matt Cardy, Getty Images)

Yoko Ono, wife of former Beatle John Lennon, poses after receiving the honorary title of Doctor of Law by the University of Liverpool, northern England, during a ceremony at the city's Philharmonic Hall Monday, July 2, 2001. The degree recognizes her artistic work and her patronage of the John Lennon Memorial Scholarship Fund, which she founded in 1991 and is now offered to students at the university. (PA Phil Noble, AP Photo)

Stevie Wonder receives the title of Dr. Stevie Wonder, as his hood is placed on him Sunday, June 2, 1996 by an unidentified official at the University of Alabama at Birmingham. Wonder was awarded the honorary doctorate of music at graduation ceremonies at the university in Birmingham, Ala. (Steve Gates, Birmingham Post-Herald / AP Photo)

Rock and Roll legend Steven Tyler, center, receives an honorary Doctor of Music degree from Provost Harry Chalmiers, left, and college President Lee Eliot Berk, during Berklee College of Music's 2003 commencement, Saturday, May 10, 2003, in Boston. (Michael Dwyer, AP Photo)

Sir Paul McCartney, left, poses with Bee Gee Robin Gibb, after Gibb had an honorary degree conferred on him in Liverpool's Philharmonic Hall, Friday July 29. McCartney awarded Gibb with a "rock and roll" diploma from his fame school today. The former Beatle honoured the pop star with the honorary companionship - the equivalent of an honorary degree - at a ceremony at the Liverpool Institute of Performing Arts. Sir Paul opened the institute, which was inspired by New York's School of Performing Arts, in 1996 in the grounds of his old school. (Phil Noble, AP Photo)

Music icon quincy Jones is hooded as he receives an honorary degree at the Washington University commencement, Friday, May 16, 2008 in St. Louis.(Tom Gannam, AP Photo)

Yale University President Richard C. Levin, right, and musician Paul Simon, left, talk together as they leave commencement ceremonies at Yale University in New Haven, Conn., Monday, May 27, 1996. Simon was awarded an honorary Doctor of Music degree at the commencement. In center is Linda Lorimer, Secretary of Yale University. (Bob Child, AP Photo)