For forty years, legendary photographer Bob Gruen has been documenting the changing face of rock 'n' roll, capturing now iconic images of The Clash and Led Zeppelin to current acts like Green Day and The White Stripes. His work has been displayed everywhere from the National Portrait Gallery in London to New York's Museum of Modern Art. From April 4 - May 4, Pop International Galleries in SoHo will present over 100 classic rock photos by Gruen, showcasing The Clash, The Ramones, Joan Jett, and more. Check out the best of the bunch. Performing in concert in 1971. The punk goddess poses for a portrait in 1976. Guitarist Johnny Thunders and frontman David Johansen in 1973. The best of Gruen's images capturing the rock 'n' roll legends. The punk rockers hang out on a New York City Subway in 1975. The Sex Pistols guitarist goes in for the kill in 1978. The Clash rocking out in 1979. Artist Salvador Dali casting a spell on Alice Cooper in 1973. The legendary singer wows an audience in 1970. We'd pay to sit at this table in 1972.