The Signature Series T-shirt line started in 1990 as a means for musicians and artists to benefit charities of their choosing. Each artist donated an original piece of artwork which was reproduced on a limited edition T-shirt and sold at Hard Rock locations worldwide and online. Since its inception, sales from the innovative series have raised more than $6 million for a wide variety of causes. Check out the entire collection of past and present Signature Series T-shirts below.

SERIES 25 ARTIST: Bono BENEFITING: The Wildlife Conservation Society	SERIES 24 ARTIST: Green Day BENEFITING: Amnesty International Campaign to Save Darfur	SERIES 23 ARTIST: Shakira BENEFITING: Fundación Pies Descalzos
SERIES 22 ARTIST: Ozzy Osbourne BENEFITING: The Sharon Osbourne Colon Cancer Program at Cedars-Sinai	SERIES 21 ARTIST: Bruce Springsteen BENEFITING: World Hunger Year	SERIES 20 ARTIST: Eric Clapton BENEFITING: Crossroads Center Antigua
SERIES 19 ARTIST: Elvis BENEFITING: Elvis Presley Charitable Foundation	SERIES 18 ARTIST: MatchBox Twenty BENEFITING: MatchBox Twenty Foundation	SERIES 17 ARTIST: Creed BENEFITING: With Arms Wide Open Foundation
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