NEW : McCartney awarded Library of Congress Paul McCartney for Popular Song . NEW : Englishman , Stevie Wonder , others perform famous songs in the Gulf of Mexico . NEW : On Tuesday , McCartney toured the Library of Congress , rehearsed for Wednesday 's concert and held a news conference with reporters . McCartney performs love ballad `` Michelle '' and quips he may get punched out by president . NEW : Obama calls McCartney most successful songwriter in history .
NEW : McCartney awarded Library of Congress Paul McCartney for Popular Song . NEW : Englishman , Stevie Wonder , others perform famous songs in the Gulf of Mexico . NEW : McCartney performs love ballad `` Michelle '' and quips he may get punched out by president . NEW : Obama calls McCartney most successful songwriter in history .