Basquiat and Haring paintings to go on show in blockbuster NGV exhibition
Crossing Lines will feature more than 300 works by the quintessentially 1980s artists
Jean-Michel Basquiat Untitled
Jean-Michel Basquiat breaks US art record with £85m sale
Painting by Basquiat, who died aged 27, is most expensive at auction of any US artist, also breaking record for a black artist