Rock superstars U2 could make up to Â£6m when their painting “Untitled (Pecho/Oreja)” is auctioned in London this week . The painting, which originally attracted the attention ofÂ band bassist Adam Clayton, will be auctioned at Sotheby’s. Basquiat, originally a graffiti artist in New York, died from a suspected drug overdose in 1988. The current auction record for a Basquiat work stands at $14.6m (Â£7.4m). In 1996, director Julian Schnabel directed the film Basquiat, based on the artist’s life and starring Gary Oldman and David Bowie. Basquiat’s paintings continue to influence young artists.