Legendary music business impresario CLIVE DAVIS turned 90 on MONDAY (4/4), and the party to celebrate the milestone brought hundreds of A+ list well-wishers together to celebrate at CIPRIANI SOUTH STREET AT CASA CIPRIANI in NEW YORK CITY on WEDNESDAY (4/6) according to a report in Variety.On hand to perform at the gala were artists who have been blessed to have worked with DAVIS over the years; BARRY MANILOW, PATTI SMITH, DIONNE WARWICK, KENNY G., ART GARFUNKEL. EARTH WIND & FIRE, BRUCE .