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Andrew McMahon (born September 3, 1982) is a Maverick recording singer/songwriter and the vocalist, pianist and main songwriter for the band Jack's Mannequin and the Geffen/Drive-Thru Records band Something Corporate.
He was diagnosed with Leukemia on June 1st, 2005. On August 23rd, 2005, Andrew recieved a stem cell transplant, the donor was his sister Katie McMahon.